As I was working on my 404 smart redirector, I found that its possible that users will get redirected to the default portal if they come in off a search engine. This is bad because say your domain is like mine: badassride.com and a user comes to badassride.com/scrapbook/images/default.aspx from a search engine, well, they will get redirected to hjtcentral.com which is my default (0) portal. Thats not good. the traffic should stay within the correct domain alias. I reported it on DNNs website, but I dont know if this will ever get fixed.
We have found several bugs with copying modules from page to page, where it has some strange effects. The other day, I actually had to go into the database and remove modules from the page with SQL because you just could not delete them. Thats a whole other post to start, I just dont have time to type that up.