When I connect my PSP to a computer and transfer files to or from it everything goes fine. However, when I click safely remove in XP, or unmount it in linux, the computer says it's unmounted/removed, but the PSP displays "Please Wait" indefinitely and I just have to either press O or unplug the usb cable.
I recently upgraded to 3.72 HX-1 when this started happening. I'm not positive but it doesn't seem to be corrupting any files this way. In the past though, it would go back to the regular "connect a usb cable" .