I upgraded to 4.0.2 from 4.0.1pl2 and have had several problems with a script I am running (Classgen at http://kongstud.hibu.no/lars/classgen/classgen.php4 (download it from there)). It gives errors related to not finding handler (FstartElement and FendElement) in relation to XML parsing and errors regarding the reset($this->Tables) and each ($this-Tables).
If you have 4.0.2, try out this script and please let me know if you see the same problems, and (more importantly) know what is wrong.
Thanks for your help,
Duncan McQueen