I use CoolDesk to Multi-Desk in WindowsXP. After a while switching between several desktops back and forward while having desktop chat windows and alpha blended, They show real slow. It takes several seconds to show'em.

I'm not sure if this is a mIRC bug or CoolDesk bug or my GForce4 128MB which sux0rs, But u might want to check the AlphaBlend a second time to find any Memory Leaks or something like that if u have any extra time.