Just thought I'd add that I get the same exact error on two different computers, one is my everyday desktop, the other is a dedicated HTPC with a fresh install of windows on it.
Can you set the <LogSQL> setting to true in config.xml, then reproduce the problem and repost the config.exe.log? I'm not in front of a GB-PVR machine at the moment to check that setting name, but its called something like that.