I have a SunPCi III on a Sun Blade 2500 and set it up to always send the video to an external monitor using the appropriate options. In any event, not long ago I noticed that the mouse doesn't stay attached to the SunPCi window. I attach the mouse using the menu or Meta+M and switch the source on my Sun monitor to view the Windows screen. It doesn't take very long before the mouse gets unattached again and I have to go back to attach it again. It's really frustrating! Anyone seen anything like that? Running Solaris 10 with all the latest patches.
I also have an Ultra 10 with a SunPCi II and once I attach the mouse, it stays attached for as long as I want. That one works perfectly fine.