I pushed a new version of FDB (version 1.15) to GitHub (http://github.com/njr0/fdb.py).
Among other minor things, this fixed a serious problem whereby tags created by FDB have the wrong type. (Sorry about that.) So if you have used FDB (the library or the command line utilities) you may want to reset any tags.
The new version is better, but can’t set tags with no value because of a bug currently present in both the main and sandbox instances of FluidDB. That means that one test currently fails.
I’ve added a KNOWN-PROBLEMS file, which documents these issues.