It is a very well-done list, and surely many of the bugs listed could be fixed.

projectile posted a thread in the Steam Users Forums to catch Valve's attention, and I think it would be nice if many people replied to the thread to make it appear at the top and convince Valve to do something about the problems.
I was given the permission to copy/paste the whole bugs list here, so click on Read more to check it out.
//Demos
1 - Flying Models
Situation: When you start to record a demo.
Comment: The 'Flying models' are displayed until the model jumps or ducks or walks up or down a slope.
2 - The buy zone disappears
Situation: When you start to record a demo.
Comment: Sometimes the buyzone disappears when starting to record a demo, and you find yourself unable to purchase items.
3 - The models switch sides
Situation: When watching a demo
Comment: The Models switch sides, CT becomes T, T becomes CT. This often occurs when there is a teamswitch involved in the early rounds.
4 - The smoke from the SG disappears.
Situation: When watching a demo with /viewdemo.
Comment: The smoke just disappears.
5 - The zoom keeps being zoomed
Situation: When watching a demo with /viewdemo.
Comment: If you pause or fastforward/rewind manually and the person being viewed is 'zoomed' there is a slight risk that the zoom continues when stopping the fastwordward/rewind where the person is using a colt/usp/ak47.
6 - The hud shows wrong information
Situation: When watching a demo.
Comment: The hud often shows us wrong information eg. -300$ instead of +300$, this is a common bug. Sometimes it also shows the wrong HP status.
7 - Invisible scoreboard
Situation: When watching a demo with /viewdemo.
Comment: The scoreboard goes completely blank.
//In game
8 - Flying boxes.
Comment: Why not fix both of the flying boxes instead of one? (de_nuke)
9 - Forbidden areas.
Comment: Forbidden areas such as the sky on de_dust should be removed because of the exploit in cups and so on.
10 - Invisible walls.
Comment: Invisible walls such as the one above the famous ledge in 'bombspot A' on de_dust2 should be fixed. (If you are sitting on the ledge you can jump up and down and 'look over the wall' and see opponents on the long yard or in the stairs.)
11 - Boost thorugh ceilings/roofs.
Comment: You can boost through thin ceilings and roofs if there is just enough space for two ducking players. Eg. the yellow house on de_nuke. The area over the catwalk ladder on de_nuke.
12 - Weapons being seen through walls
Comment: Sometimes if the wall is thin enough and your weapon is long enough the opponent on the other side can see your weapon through the door/wall. (This is if you are close enough to the door)
13 - Models being seen through walls
Comment: The same thing as with the weapons but with models instead of them. A well known example is the one where you are sitting down(ducking) in the yellow house with your ass hanging out through the wall. (The yellow house in the main bombspot on de_nuke)
//Misc
14 - Cl_righthand gets the opposite value.
Situation: When tabbing out to Windows and tabbing back again
Comment: If you are using cl_righthand 0 it switches to cl_righthand 1 as you tab through windows.
15 - Models being rendered the wrong way.
Situation: Various, from time to time, when you are unlucky. (THIS IS THE MOST ANNOYING BUG IN THE WHOLE GAME, IT MESSES UP YOUR BRAIN AND HAUNTS YOU WHEN YOU SLEEP, DAMMIT FIX THIS ONE)
Comment: The models are being rendered sideways or something. When you are watching the model (from another computer of course) it looks as
if it is looking towards the side when it in fact is looking directly at you. This can be VERY devastating in a situation when you are sneaking up behind a lot of people.
16 - Reload.
Situation: Various
Comment: The model sometimes acts as if it reloads, it doesn't really reload, it just looks as if it does. Very annoying, can be solved by either shooting or dropping and picking up the weapon or reloading it.
17 - Glock.
Situation: Various
Comment: Sometimes the glock starts shaking as if it was having a seizure. Drop/pickup usually solves it.
18 - Silentplant.
Situation: When planting one half of the bomb inside a box and the other side outside the box.
Comment: This bug has been around since the creation of de_ maps.
19 - Flashbug.
Situation: When flashing between boxes, often in very tight spaces.
Comment: When flashing eg. under the flying box on de_nuke all of the players in that room gets a maximum flash. Same thing goes for the boxes just outside B on de_dust2, between the little and the big one right outside the door. This flashes everyone in the dark passage.
20 - Flashbug2.
Situation: This is actually not a bug, it's a flaw from the recent change of the
flashbang system. When getting a lot of flashbangs in front of you, eg. when trying to storm an armed bombspot, the flashbang time
adds up and you go blind for like 10 seconds, this is way too long when it comes to serious gaming. It is impossible to conquer an overtaken
bombspot with this kind of flashbang system.
21 - The defuse keeps going despite the fact that you have released the button.
Situation: Various.
Comment: This is very annoying when you are trying to release the bomb to someone with a defuse kit.
22 - The awp sound gets cut off.
Situation: When shooting with the AWP/AWM and fastswitching instantly to a knife/grenade the sound gets cut off for the opponent trying to listen where the shooter is going.
Comment: Not really a bug, but would be nice to get a fix for this.
23 - Switch sound.
Situation: When switching between weapons.
Comment: This should not be able to be heard by other players than yourself. I don't know but it feels like some players hear it and some don't. I can't even hear it when i maximize my volume.
(The knife and zoom sound should be kept as it is). But other weapons are not supposed to be heard when switching between. Eg. Usp/Colt
24 - The Helmet Icon dissapears.
Situation: Various
Comment: Sometimes the icon shows a helmet, sometimes it don't. No I'm not stupid :P. This is a very uncommon bug, but it occurs now and then.
25 - Bomb explosion despite of defuse.
Situation: When finishing the bomb defusing in the exact same moment as the bomb blows up.
Comment: The CT survives, it says "Bomb has been defused", the bomb blows up. I have no idea who wins but it certainly gives the game a little spice.
26 - Hud_draw exploit
Situation: When using hud_draw 0 with AWM/AWP
Comment: When using this command the blackout of the scope area disappears.
27 - Perspective switching. (wallhack)
Situation: When you play spectator and start switching between two persons who
are far away from each other.
Comment: The picture 'slides' from player to player giving the spectator a short blink through the map, (giving him a chance to spot opponents just like with wallhack)
28 - Wrong information from hud.
Situation: When you are spectating
Comment: Sometimes the hud shows wrong information eg. HP and name and so on.
29 - Players keep walking!
Situation: Various
Comment: Sometimes the controls stall and keep going, the solution is to type -forward in the console if you are going forward etc etc.
30 - Double bullet hole.
Situation: When playing as a listen server.
Comment: When starting a listen server and playing on it you often get two bullet holes instead of one, this often occurs when using the glock. One of the bullets actually hits, the other one is just rendered as a bullet hole on some random location close to the other one.
31 - Spectator bug
Situation: Spectating/being dead.
Comment: Sometimes the spectator window stalls, it doesnt respond to anything, the solution is to type either +duck/-duck or spec_menu 0.
32 - Shooting bug.
Situation: When shooting a single bullet and switching to another weapon really fast.
Comment: The actual shot is being displayed but the server doesn't receive it. The models just display it, you don't loose any ammo either.
33 - Duck bug. - VERY IRRITATING -
Situation: When jumping where the roof is quite low.
Comment: Sometimes when you jump up and down and try to go forward, yo get the same speed as if you were crouching. Eg. In the area above the ladder on the catwalk on de_nuke (close to ct-spawn).
34 - Corpse thingy
Situation: When someone dies close to a wall
Comment: The corpses stick out through walls
35 - Corpse thingy 2
Situation: When walking on a corpse
Comment: The corpse gets attached to the foot and follows the moving player. en.
36 - Silencer
Situation: Often in hltv
Comment: Sometimes it looks as if the person is using a silencer when he actually isn't. Often occurs when you are watching someone using an usp.
37 - Reload
Situation: When someone reloads - VERY ANNOYING -
Comment: Sometimes you see someone reload and shoot at you in the middle of it. It's just like the physical reload is delayed when you watch someone reload, the reload should be synced dammit, you get totally fooled. :P
38 - Ladders
Situation: When trying to climb up a ladder while crouching.
Comment: Tro climb up a ladder silently (when holding +duck) you have to either jump up the ladder or walk up it in an upright position. You can't approach and climb up the ladder while crouching.
39 - Lefthand/Righthand
Situation: When watching demos/HLTV
Comment: The knife is always found in the left hand when watching a demo even if you are using cl_righthand 1.
40 - HLTV
Situation: When watching someone shoot from an ineye perspective with a "drag shot".
You see the bullet hit the opponent before the player that you are viewing acutally has moved his crosshair.
41 - Zoom HLTV
Situation: When watching through a HLTV
Comment: When watching through a HLTV and the guy you are spectating zooms, the map also get zoomed in.
42 - The corpses float through the map causing performace to drop as it is rendered in the background. The corpses can also be found when shooting someone on 'level 2', running down to 'level 1' where they come floating down through the ceiling.
43 - The hitbox is crazy when it comes to shooting someone from behind.
Note that HecaZ gathered most of these bugs. the translation and the additions were made by projectile.
Thread in the Steam forums