Not new tab?
When I'm on Google Reader and I click on GMail the script opens a new tab with GMail, it's OK. But if GMail is already open in another tab, the script doesn't open the tab with GMail but opens a new tab. Could you change it?
Sorry, my english is not perfect
This is actually the "normal" functionality of the topbar, and not something the script is controlling. I might be able to add this into my extension, but I'm not sure. I feel your pain, though. I hate the fact that it keeps popping up new tabs instead of reusing old ones.