Its interesting that you've encountered this. What platform are you running on ? Weblogic or Websphere - and what platform is the J2EE server running on ?
What Java Engine are you using for the JAS Server?
What Tools Release are you on - though it sounds as if you're running above 9.1.0.4 since you have breadcrumbs.
What database is E1 using ?
Sorry to ask all the above - but it seems that theres a lot of difference between the slightest change on any of the above !
Personally, I'm running Weblogic 10.3.6 on JRockit 1.6.0_31-b05 on Windows 2008R2 x64 with Tools Release 9.1.2.1 (though just upgraded from 9.1.0.3). Currently, I have no issue with moving through menus - and I am using Internet Explorer 9, Firefox 16.0.2 and Google Chrome 22.0.1229.94 to test. I do have ActiveX turned off on the webservers however.
It might be important to check the Task View Tables to ensure that all the indexes are correctly present. Also, depending on the database, you should probably look into rebuilding statistics to improve performance. Perhaps its possible to look at the database side on the F9000, F9001 (and F9002 if you have languages installed) tables. There should be 9 indices on F9000 and 9 on F9001...perhaps you should consider rebuilding the indexes to see if that helps ?