Anoing behavior while debuging (idea window disapears)

While debuging in idea the current project window simply disapears.
I use 2226, but this behavior it occurs since a long time.
I've seen this in some builds of Aurora.
I have an Athlon XP 1600+, Windows XP.
It also appears on my laptop Fujitzu-Siemens Amilo Pro V2000, with
Windows XP.

Anyone is having this problem also?

Thanks,

Daniel