This problem was fixed in v0.9.0. Check to see if you are using an earlier version by clicking About under the Help menu. If so, upgrading to the latest version will likely fix the problem.
If you are getting this error while using v0.9.0 or higher, please send your PandoSetup.log file (located at C:\Documents and Settings\<username>\Local Settings\Temp) to support@pando.com. We’ll look into it for you.