Feel free to dump all the bugs you've encountered. I'm gonna email HMS again.

One's I've personally encountered (PC):
Ground based Vehicle modes tend to wobble back and forth/spazz out when stationary. It doesn't effect anything other then the look.
The only Multiplayer that isn't broken is Private Lobby.
Game likes to freeze when you're at the friend menu.
You can not use G1 Optimus Prime Parts for your custom character. This IS a glitch. Console users do not have this problem.
Cliffjumper's level has a big loading bug.
Credits seem unfinished compared to the Console one. The correct credits are talked about here.
Vehicle modes sink into the platforms in the Create A Character menu.
For some odd reason, Shockwave's name keeps appearing at the bottom right hand side of the screen. (May have to do with my tendency to use his WfC gun)

That's about all the glitches I've seen in my game.

For one's I've seen reported (That I do NOT have):
G1 Pack items not showing up at all.
NPCs have choppy animation.
Vehicles hard to control. (PC)
Sound Issue.
Clipping under floor brushes.
Escalation sometimes causes "blurriness" onscreen.

 

once in escalation i played as wheeljack, is trunk thrusters were aimed at odd angles. once in the last level rumble didn't open the door, but instead watched as the con sitting on the tentacle got lunched off the ship

there is still the sound issues you forgot to mention

 

Havent ran into any sound issue, so never knew.

 

When I first started the campaign I fell through the floor and had to restart.

Earlier today in an escalation match at Ignition everything was really blurry for some reason. As soon as the first wave of enemies spawned it went back to normal.

 

Every now and then the game will freeze within the first 5 seconds of a Campaign level and I'll have to reset the PS3. It seems to only happen if I quit Campaign and then go back in.

 

it wasnt so bad when i first started, but oftentimes everything will freeze, it will say loading, then go back to normal. Didnt happen the first time i did the first prime mission, but did the second.

 

I've had none of these except for the Shockwave glitch, which is not because you use the gun, it was in the demo.

 

Xbox360: I randomly floated above the map during a deathmatch game. I could shot down but could not jump down or anything But was able to walk anywhere aboce the map. People saw me too but they couldnt hit me. but I could shoot them > 

 

Xbox360: Randomly floated to the top of the map and was able to walk outside of the map and shot people but they couldnt shoot me but they seen me floating above the map too. Couldnt get down.