Adam,

 

1. The modules that I have seen that use the SharpZipLib are the FIleManager, the skin uploader, the install new module uploader.

 

2. URLs

dev - http://nmfta.tangoinc.net/dnn

production - http://www.nmfta.org

 

3. I could not recreate the issues on your site.  Is it DNN 4 or DNN 3?

 

Cheers,

 

Scott