I just noticed a bug with infantry lasers.
I played the first mission - (the defense-only “tutorial” -type level.) And placed some squads of Veteran Laser Infantry in the trenches and bunker closest to the enemy spawn-point. As I zoomed closer to the ground, I noticed that their weapons were completely soundless! All the other sound effects appeared to be working properly - the noises the laser rays made when they were absorbed by enemy shields, the gunfire from nearby Machinegun Commandos, the robotic noises the mechs made as they stomped about - just not laser rifles! This was particularly noticeable when my Veteran Laser Infantry faced off against enemy Veteran Laser Infantry. Both sides engaged in a completely silent firefight where the only noises made were death-screams and “hit”-sound effects. The actual weapons were completely silent. As I just noticed this bug completely by accident, I do not know if the bug is old or new.
Two "NVIDIA GeForce GTX 680"s in SLI.
“Intel Core i7-3960X”.
64-BIT “Windows 7 Ultimate”.
“Creative SB X-FI Titanium”. (Latest drivers.)
Game runs from a standard, non-SSD-drive.
I have tried playing the sound both through a set of “Logitech G930”-headphones, (Latest drivers.), and “Logitech X623” -speakers.