"Stephen J. Turnbull" wrote: Oops, apparently I forgot to cc: the xemacs-beta mailing list. Sorry. Will do this now. I first noticed it with 21.2.36 "Notus" on Linux: uname -a: Linux altmark 2.2.16 #8 Wed Sep 13 08:35:13 CEST 2000 i686 unknown xemacs -V: XEmacs 21.2 (beta36) "Notus" [Lucid] (i686-pc-linux) of Thu Oct 5 2000 on altmark But it also happens on AIX 4.3.3: uname -a: AIX pdw7 3 4 00494C4A4C00 xemacs -V: XEmacs 21.2 (beta36) "Notus" [Lucid] (rs6000-ibm-aix4.3.3.0) of Tue Oct 10 2000 on pdw7.boeblingen.de.ibm.com I couldn't reproduce it with 21.2.35 "Nike" (neither on Linux nor on AIX) and IIRC from the time I used 21.2.35 (not soo long ago! ;-) ), it has never occured with that XEmacs version. I should also note that I have set `buffers-tab-selection-function' to nil. Only this in addition to the two other settings shows all buffer tabs at a time. Ah, and it looks like it has to do with whether there's already a buffer open for a file or if you open a file for the first time. In other words, here's how I can reproduce the aforementioned behaviour: Start XEmacs, set the above variables for buffer-tabs to their values to display the tabs for *all* buffers, open a few files - long filenames preferred - until the gutter is filled up with buffer tabs. This is all ok, as long as you open files for which there's no existing buffer (i.e. haven't been opened before). But if you *switch* to a file previously opened (i.e. an existing buffer), the buffer tabs overlap. Hopefully this is enough information so that an expert can track this down ... Markus