[arch-general] Anybody else having trouble with Virtualbox after upgrade

[Pico Geyer]

Hi all.

I hope this is the right place for me to raise my issue.
After doing a pacman -Syu and then rebooting I noticed that I could no
longer start my VirtualBox vms

I get the following error: Failed to open a session for the virtual
machine My_VM
Callee RC: NS_ERROR_INVALID_ARG (0x80070057)
Virtualbox then crashes (segmentation fault).

I had the testing repo enabled, so I thought that one of the packages
from testing might have broken it.
So I disabled the testing repo in pacman.conf and removed all testing
packages with:
pacman -Syy
pacamn -Suu

I then recompiled my virtualbox drivers and rebooted.
But that did not help at all.

I created a core dump file by following these instructions:
http://www.virtualbox.org/wiki/Core_dump

So the stack trace is 41000 lines long :-|
I'll paste just the first and last few lines:
#0  0xb5cad825 in ?? () from /usr/lib/libQtGui.so.4
#1  0xb5ca7b27 in ?? () from /usr/lib/libQtGui.so.4
#2  0xb5ca9760 in QTextEngine::itemize() const () from /usr/lib/libQtGui.so.4
#3  0xb5caeca8 in QTextLayout::beginLayout() () from /usr/lib/libQtGui.so.4
#4  0xb5b9b550 in ?? () from /usr/lib/libQtGui.so.4
#5  0xb5b9c1b1 in ?? () from /usr/lib/libQtGui.so.4
[snip]
#41537 0xb5a36407 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#41538 0xb6b5405b in TrustedMain () from /usr/lib/virtualbox/VirtualBox.so
#41539 0x08048d9f in ?? ()
#41540 0xb76ccc76 in __libc_start_main () from /lib/libc.so.6
#41541 0x08048c81 in ?? ()


Any advice?
Should I file a bug in the arch bug tracker?
Thanks in advance.
Pico