using tmp latest dev-build with "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1b3pre) Gecko/20090304 Shiretoko/3.1b3pre" - the new tab button which was added in 3.1 used to be positioned at the right end of tab bar. firefox 3.1b3pre moved the button right next to the last tab, (a-la IE7). however, if I install tab mix plus, the new tab button is back (ANNOYING!!! ANNOYING ENOUGH to uninstall TMP!!!) at the end of the tab bar.
Patience, please. You are expecting perfection from what are not production releases of both the browser and the extension. It is quite unreasonable to expect Gary and onemen to keep up with the ever changing whims of browser developers such as changing the placement of the new tab button.
If you want perfection, I recommend you only use Firefox 3 with the production release of TMP and that way you will not be annoyed. However, if you still want to keep using preproduction versions of Firefox such as Shiretoko, please refrain from unproductive and unhelpful comments such as this. REMEMBER just how much you are paying for the use of Firefox, Shiretoko, and TMP.
Now, if you really want to help, you can alert Gary and onemen that you have discovered a broken functionality in TMP AND provide them the regression range--that is which nightly release was the last one where the TMP function worked correctly and the first nightly release where it was broken. For the tab button, ID which nightly was the last where the button was on the far right and the first nightly where it was next to the tab like in IE. By providing them this type of information, you quickly aid them to find the culprit patch(es) that were landed into the browser and figure out how to handle it in TMP.