I dist-upgraded my embedded HSQLDB from Ubuntu 11.04 in 2 steps to 12.04. Now my embedded HSQLDB is read-only. I can search in it though.
DistroRelease: Ubuntu 12.04
Package: libreoffice-base 1:3.5.2-2ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
Date: Wed May 2 07:38:15 2012
InstallationMedia: Ubuntu-Server 11.04 "Natty Narwhal" - Release amd64 (20110426)
UpgradeStatus: Upgraded to precise on 2012-04-30 (1 days
Cant reproduce on 3.5.3 on precise. Needs reproduction scenario => Closing WORKSFORME for now.