We have recently upgrade from Jboss 3.2.3 to 4.0.3SP1 along with going from Postgres 7.3.2 to 8.1.2. We are having two makor issues that are dramatically affecting out site, that until a few days ago was rock solid on the old platform for 1 year:

The two issues are in these postings:

http://www.jboss.com/index.html?module=bb&op=viewtopic&t=75755

http://www.jboss.com/index.html?module=bb&op=viewtopic&t=75756