Fabio,
I can see the crash on VFP9beta, but in my computer no crash occurs under VFP8.0 SP1. What I see under VFP8.0 SP1 is the first page is not removed from the form. I can still see it. I cannot bring it to front by clicking it, that's true (the page doesn't even exists), but VFP doesn't crash. I can close the form and run anything afterwards. It seems pretty stable to me.
Hope this helps.
Grigore Dolghin
Class Software.