Sorry, but what about testing the new software release before sharing?...
I will change to VMWARE FUSION 5, it runs like a charm
Leon - you really need to get your facts straight:
1.) Parallels 7 was released on 9/6/2011
2.) Mountain Lion was released on 7/25/2012
Parallels 7 is not considered "new" as of this time - Mountain Lion is considered "new" - how do you know that the changes that Apple made did not break Parallels functionality that worked on all previous versions of OS X?
Another fact that you've overlooked - Parallels generally has a major release with each OS X version - 10.5 = Parallels 5, 10.6 = Parallels 6 (x64), 10.7 = Parallels 7 - and 10.8 = Parallels 8 (Sept. 4th, 2012).
YanaYana is right - this is a bug that I'm facing as well and it will eventually be resolved. It is annoying, and not something that I would expect long term, but at the same time I'd rather have them isolate, test, and then functional test other aspects that could be affected as opposed to just releasing something quickly that causes more issues.
Maybe you should have waited with upgrading your machine...I upgraded knowing that there would be some issues with software - if you think that development and testing of a solution like Parallels is a piece of cake and that they have failed at doing their regression testing, then move to something else. I have used all the virtualization software products out there - Parallels has been better then any of them for the Mac. Take some personal responsibility in your action through upgrading as well and let the dev's keep working towards a solution without stating annoying comments.