I just upgraded from 3.1.2 to 3.5.1 and now the system log shows an error finding common.js. This file was not present in the previous version.  Here's the complete error from the system log:

Could not find file 'C:\inetpub\wwwroot\Gemini\Scripts\common.js'.

at System.IO._Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITYATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy) at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, String msgPath, Boolean bFromProxy) at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share) at System.IO.File.ReadAllBytes(String path) at CounterSoft.Gemini.Web.HttpCombiner.GetFileBytes(HttpContext context, String virtualPath, Encoding encoding) at CounterSoft.Gemini.Web.HttpCombiner.ProcessRequest(HttpContext context) at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()

at System.Web.HttpApplication.ExecuteStep(IExecutionStep step,