VirtualBox 3.1.0.beta 2 - Assertion Failed

[MrX1980]

Hello

I have installed Windows Vista Ultimate german as a guest, then SP1 and SP2.
After that it seams that the screensaver of Vista chrashes VB (with a strange high noise/beep of the TFT-Monitor).
In the Log I found this:
01:37:24.596 Guest Log: VBoxService.exe: Error: No file information found! File = C:\Windows\system32\VBoxGINA.dll, Error: 2
01:37:24.596 Guest Log: VBoxService.exe: Error: No file information found! File = C:\Windows\system32\VBoxCredProv.dll, Error: 2
01:37:53.390 Guest Log: !!Assertion Failed!!
01:37:53.391 Guest Log: Expression: FALSE
01:37:53.391 Guest Log: Location : D:\tinderbox\add\src\VBox\Additions\WINNT\Graphics\Display\vbox.c(620) vboxHwBufferWrite
...

Host:
Windows XP Professional 32bit german
... (see Logs)

[sandervl]

The assertion will be removed in the next beta. (it's harmless)

[MrX1980]

Still exists in beta3

[sandervl]

Did you update the additions? (you should)

[MrX1980]

I have tried it (removed the old and installed the new) but at the restart I get:

[sandervl]

Every time you start the VM?

[MrX1980]

After several bluescreens and 'unintentional' reboots I dicided to make a clean installion of Windows (host+guest).
So at the moment I can't test it.
I hope the problems are then 'gone away'.