As far as I know it should work.
Can you edit this jsfiddle example so that it replicates the situation
you are in and see if you can duplicate the problem:
http://www.jsfiddle.net/Ncv4R/
If you can then press the "Update" button to get a new URL demonstrating
the problem and post that URL back here. That way I have a test case
that I can use when trying to fix the issue.
Thanks,
Kelvin :)
I've added this as an issue on github and will investigate as soon as
possible:
https://github.com/vitch/jScrollPane/issues/issue/25
Thanks again for the bug report and the test-case,
Kelvin :)