What browser is it?  If it's Firefox (or another Mozilla engine), it may be caused by a reflow bug that still exists in the 1.0 branch.  (Though is fixed for 1.1, I believe)
To test, when you get it, do a Ctrl-<Plus> Followed by a Ctrl-<Minus> to force the page to reflow.  If it returns to the correct number of columns, you know it's a browser bug, and not a code bug.

On Wed, 2005-09-28 at 09:15 -0400, Constantinos Neophytou wrote:
I also get this some times, I have not been able to figure out a
relationship of actions to when it happens. I think it's mostly after
I mess around in the configuration tab, but i've never touched the
'number of columns' option... it's always set to 1.

And the problem is only on one browser, and only for searching
(index.php doesn't have that problem, and other browsers don't have
that problem at the same time). It goes away by itself...

On 9/28/05, Andreas Goetz <cpuidle@gmx.de> wrote:
> Same behaviour when you go to index.php first?

Douglas Mayle <douglas@mayle.org>