libevent "error" causes Tor not to start at all

This is only tested on Windows Vista with Service Pack 1 and all updates except Windows Search 4.0

Tor 0.2.0.30 stable version was released officially a few days ago, but upon upgrading or uninstalling/reinstalling, the following messages always showed up 100% of the time.

Aug 03 19:44:21.798 [Notice] Tor v0.2.0.30 (r15956). This is experimental software. Do not rely on it for strong anonymity. (Running on Windows "Longhorn" Service Pack 1 [workstation] {terminal services, single user}) Aug 03 19:44:21.936 [Error] Error from libevent: evsignal_init: socketpair: No error

First of all this should not be experimental software since it is a stable release, and how come I am unable to start Tor especially when the "error" is actually "No error"?

[Automatically added by flyspray2trac: Operating System: Windows Vista]

Trac:
Username: coshan