I'm suspecting a PHP 5.2.4 - specific bug in PHP, as some of you reported php 5.2.4 being installed.
can you easily revert to PHP 5.2.3 ? if yes, please try and report back.
Do you have that text "Bruker ID" somewhere in your tab title or descriptions ? or in field titles or descriptions ?
if yes, try adding a space or other chars before or behind.
Would be cool if you could:
1) try add spaces, see that bug disappears
2) revert, see that bug reappears
3) re-install php 5.2.3
4) report back here and as reply to your post what worked.