Works well, although I tweaked it a bit

I really like this userstyle, although I think the fix discussed in "hover over does not reveal exit button" should be added to the default version since I had that same problem. I also modified the margin-right value on the .tab-text from -2 to 1 since it bugged me that the tab text could go all the way out to the far right pixels of the tab.
With those two tweaks, though, this is a really great way to conserve space on the tabs.
With those two tweaks, though, this is a really great way to conserve space on the tabs.
Comments
Did some CSS code cleanup and fixed the issue of the 'Close Tab button' not always appearing when tab is hovered in Tabs Overflow Mode. Also Configuring [Ext] Tab Mix Plus settings may not be required for TMP to be compatible with this style anymore.
Give the latest style update that I just uploaded a try and let me know if you are still experiencing any problems.