Here is some stuff that Beryl killed after I installed it...
Suspend no longer works... actually it suspends okay, but returning from suspend no longer works, I just get a black screen with my mouse cursor and a box shaped part of screen is dostorted in colors and that's all... sometimes ctrl-alt-backspace works and I can relogin succesfully, BUT I have to reload windows manager for Beryl to work again, and sometimes it just freezes the comp.
Checkgmail icon in tray shows the lists of incoming mails, but it is no longer possible to click on any of the links there (i.e. mark read, delete etc)
Not sure, but I believe Amarok loaded a lot faster b4...
That's all for now
Windows is extremely fast after a fresh install. If you want to make it stay that way: - don't use it.