Build 5600.0 does not resolve 99.9% CPU use on startup

Urgent issue (for me) Parallels completely unusable - can't even get to the splash screen on startup. CPUs go to 100% and application is unresponsive. Have to force-quit to be able to do anything on my Mac (as the CPUs are not giving much time to anything else).

Uninstalled and reinstalled Parallels - did not help. Rebooting Mac did not help.

Leopard 10.5.2. Latest MacBook Pro4,1 2.6Ghz 4Gb RAM

When I force-quit Parallels, the following *long* and quite recursive stack backtrace results (attached as .txt.zip file). Fix urgently requested!!