patch 1.25 was released today, and it's another biggie at 287mb so could try that.
http://files.i3d.nl/download.php?cat..._1.25_full.exe
other than that try updating pb or reinstalling it, a couple of my fellow clan members have found that pb had been running extra processes in the background, they made fix (will see if i can find it, but not at fault for any probs).