After VirtualBox updated itself to v. 4.1.12, I experience some problems.
Now, I understand these could be completely unrelated and there could be well above a million reasons lying outside VirtualBox but still...
The short version: the guest OS (Win 7) just hangs completely and must be reset. The VirtualBox application itself, as well as MacOS X are completely unaffected.
The problem occurs relatively infrequently (but still frequently enough to be a pain in the, hmm, neck). It could be also related to VisualStudio 2010 Express edition because all of the freezes occurred while doing some (often processor and memory intensive) task in it (like compiling, opening the Win Forms designer etc.).
