Add us to the list of people experiencing this problem. We're running into some massive slowdowns and timeouts. we've already corrected the DesktopModules.SupportedFeature issue, no -1's remaining there. We're running a site with 9 portals, 7 of which have identical sitemaps -- so we by necessity have duplicate tabpaths allbeit in seperate portals. We do not have duplicate tab paths within the same portal.

I have not seen a bug raised and honestly I don't if its a bug or issue with my installation. (Although it looks like bug with so many out there facing the same issue). The last time I raised a bug against the store module, I was fired badly for doing so, which was very weared. Since I am not DNN expert, I am not sure who is the right person to approach on issues that are potientially bugs (at times very serious ones).

Did you happen to be working with favicons when this happened?
If so, rename favicon.ico to favicon2.ico in the last portal you were working on, or all your portals if you have to. 

Scratch that.

Do you have Scan