I made the mistake of upgrading to Parallels 4 a few days before a presentation I was giving on my MacBook Pro and my presentation suffered greatly for it.
Besides the extremely slow performance of P4 compared to P3, the biggest bug was that the CTRL and ALT keys would get "stuck" when I switched between Parallels and OS X using Leopard's Spaces. Whenever I returned to Windows, if I tried to type anything, it would apply CTRL+ALT to it. So, if I pressed L, it would attempt to log out of Windows. Other keystrokes would cause system menu bars to open.
The only cure is to restart Parallels.
I'm going to upgrade to the new build, but this has more to do with the new keyboard shortcut methodology in Parallels 4 than anything else. It was not broken before, I don't know why you "fixed" it. In fact, you broke it. Change it back, the new way provides zero benefit and nothing but headaches.
Besides the extremely slow performance of P4 compared to P3, the biggest bug was that the CTRL and ALT keys would get "stuck" when I switched between Parallels and OS X using Leopard's Spaces. Whenever I returned to Windows, if I tried to type anything, it would apply CTRL+ALT to it. So, if I pressed L, it would attempt to log out of Windows. Other keystrokes would cause system menu bars to open.
The only cure is to restart Parallels.
I'm going to upgrade to the new build, but this has more to do with the new keyboard shortcut methodology in Parallels 4 than anything else. It was not broken before, I don't know why you "fixed" it. In fact, you broke it. Change it back, the new way provides zero benefit and nothing but headaches.