Tested it again on a desktop with XP, SP2 and no .Net 3.0 and .Net 3.5 framework.
No error on 1.5.4. Got the error on 1.6.1. Dependency Walker reports a side-by-side configuration read error on de libpanda.dll.
Installed .Net 3.5 fixes the problem and now Dependency Walker no longer reports the side-by-side configuration error on libpanda.dll.
However the test yesterday shows that .Net 3.5 isn’t needed, so my conclusion so far is that the libpanda.dll somehow is build differently than the other dll’s. Is it possible it is build for Vista only? Just an idea.