Parallels 6 - shockingly unreliable, going back to v5

Last week after I installed the latest 6.0 build, my Macbook immediately started locking up completely, and I had a few bluescreens in Windows all of which lost me a certain amount of work.

I then fitted a spare (new) hard drive to my mac, built a new OS up to 10.5.8 (previously I was on 10.6.4) and painstakingly reinstalled all my applications.

I then converted my VM to Fusion and ran it for a few days to see how it compared... it wasn't quite as nice as Parallels if I'm honest but it was rock solid. I then hit the windows activation period and fired up Parallels 6 again to see if matters had improved.

No.

So far today in 3 hours I've had two complete mac lockups and 1 BSOD in Win7. Fairly minimal open apps at the time in both OS, so it's not like I was pushing it or anything.

So I've had enough of this, I've had disruption for a week from a supposed 'upgrade' and am seeing nothing in the forums from Parallels staff, just quite a few other users with similar problems. I'm now going to see if I can revert back to v5.

Not happy at all.

 

I also had a "blue screen" after migrating my Windows XP VM from Parallels 5 to Parallels 6.
I ignored that, but now I'm experiencing problems in compressing my VM which is continuosly increasing in size... "The disk has snapshots or is corrupted", but none of them is the case.
I tried to go back to Parallels 5, but, apart from not being able to install the correct version of parallels tools, the problem in compressing the VM disk remained.