The error I was running into was in the code file IssueList.aspx.cs, however, I did a search of the entire codebase for Request.Params and made a change everywhere it looked like the key was likely coming from the Querystring, however, without knowing the code it could be that I introduced bugs if the key was not from the Querysting but instead from a form or cookie. I also found and changed code in:
SubversionBrowser.aspx.cs
Rss.aspx.cs
EditProject.aspx.cs
CloneProject.aspx.cs
AddProject.aspx.cs
Thanks!
And BTW, so far I'm loving the project. I'll for sure send you a donation if I choose to use it.