Hi Tyge,
When you are updating via repository, you get the version tagged for APM release. This is (intentionally) not the newest version from the repository (a package maintainer has to release it).
We are in the process of finishing up the OpenACS 5.10.1 release, where much of the computations concerning the location were generalized to cope with cluster setups. I would not be surprised, if this fixes the issue you are seeing.
Please stay tuned, the release candidate should be out soon (with appropriate tagging for APM).
