So it seems to me that there is something wrong with the pool object, but I have pool 0.1.0 and I think that's the latest version of that external.
The CVS has the newer source version 0.2.0, but as I don't use Pd on Windows or Mac, I don't know, where a binary for those OSes could be.
Actually, i try to sort out some remaining things with the new pool version and try to make a release by Monday or so. (including binaries). So, now is a good time for bug reports....
best greetings, Thomas