Bad argument: #<subr string-match>, (), 2

[Milan Zamazal <pdm zamazal org>]

I sometimes (especially when switching virtual desktops) receive the
following sawfish error:

  Bad argument: #<subr string-match>, (), 2

Does anybody know what could cause the error or how to get more
information about it (e.g. backtrace)?

I use sawfish 1:1.3+cvs20060518-2 from Debian on amd64.

Thanks,

Milan Zamazal

-- 
http://www.zamazal.org