I've installed Firebug.
I'm not sure how to interpret the results I'm seeing as I've never seen the app before 15 minutes ago.
However, I've somethings that might
be of help. This screen
image shows the model used to create a vertical splitter bar. This
one shows the same results for a 'fat' horizontal one. The source in both cases is the Ajax - Initial Size online demo page.
the style details associated with the horizontal splitter.
If there's something specific you or the team need me to do/get from firebug, let me know.