darkredshift: has GOG finally taken their finger out their ass and made a patch for this bug?
Bear in mind that GOG do not get game source code, so they cannot fix all problems. They can tweak executables to use more than 2GB RAM, and add shims to add "out of the box" compatibility. They can also use known fixes and patches in certain circumstances, as well as 3rd party applications (e.g. DOSBox for DOS games, nGlide for 3DFX emulation, Direct Draw wrappers, ScummVM, etc).
Fixes and tweaks along these lines are fine, but beyond these, all GOG can be expected to do is to contact the game developer. The GOG staff are not the game developers.
As for the TR2 music bug, as per the post that you've already commented in:
http://www.gog.com/forum/tomb_raider_series/bugged_music_in_tomb_raider_2 GOG included the fan made patch that seems to have fixed the music bug for some, but it looks like not everyone.