Since yesterday I cannot open a new tab by middle-clicking or Ctrl-clicking on a link in Firefox. I tried a lot of things to get rid of the problem (restart browser, restart computer, disable plugins installed lately) but nothing worked.
Disabling Tab-Mix-Plus made the issue go away but it turns out that Tab-Mix-Plus wasn't the (only) cause. To fix the problem download the latest Greasemonkey version 0.9.11. This makes the issue go away and you can continue using Tab-Mix-Plus.
Happy as a clam.
