Using 1.2.3.
I cannot give you exact steps to reproduce but this issue happens when using IEtab.
When using IETab, sometimes if that tab launches other IETabs, when you return to that original IETab, you can no longer browse any site in that tab. The URL in the address bar will change to the site you are trying to access via bookmarks but nothing happens. Refresh fails to work and pressing enter on the address bar fails as well. Have to close that tab and open another to fix.
