Last modified: 2014-11-18 18:07:20 UTC
Pressing tab in the edit box (with the editbox TOC on) results in a tab character being inserted in the wikitext, instead of changing focus to the summary field (or anything else). Tested on Chrom 4.0.249.78 under WinXP.
*** This bug has been marked as a duplicate of bug 22311 ***