Slow with huge data site, IE only

[ap87]

Hi

I'm using this plugin on my data/statistic site.
On my site I only have this sidebar/navigationbar and a fixed sized div beside it.
When i add probably a few thousand record (in a table, inside my div), the sidebar becomes really slow, takes 3-5sec to show. Notice that my div is fixed size with overflow:auto, so the sidebar remains the same size nomatter what.

In Chrome the sidebar shows instantly even with a million records in the div?