there is an issue with rendering of IFrame component of console in IE. I have looked into that and have a preliminary fix for this. It is not fully tested yet but if you are interested and can provide you with new build of jbpm-console with this fix (version 1.3.0 at the moment).
Will submit a patch for version 2.0.x after more detailed tests.
I installed the new jbpm-console 2.0 and it works fine with IE and Lotus Notes