Generate Entities hangs on Oracle database

On a Debian box I have setup an Oracle XE database. From within Eclipse I can create a connection to the database and see all the tables in the schema for the user that I have logged in with on the database. When I try to Generate Entities from the Seam perspective, CPU usage goes up and then dies out after a few seconds. This happens on both Debian Linux and Windows XP, trying to connect to the same XE database. The same procedure works perfectly ok using a PostgeSQL 8.3 database, both from Debian and XP.

I am trying to find out what is going wrong but haven't been very lucky. Starting up Eclipse with -debug and -consolelog doens't provide any clues as to what is going wrong. I have updated DTP which only installed the latest doc. I am at a loss here. Please advicve how to debug further so I may either find a workaround or file a bug.