Great. Then it is exactly what I thought: a bug I already solved. You can interchange the jdbcclient.jar with your monetdb-jdbc-1.X.jar file. The former contains the latter, and in your case, the latter is outdated.
Thank you - I'm using your jdbcclient.jar instead of the 1.7 driver and indeed it is now working great!!! Thank you. I was surprised that the nightly stable does not contain a source build of the latest jdbc driver (at least, not that I can find) but yours is working nicely. The only other hurdles I have left to cover is that we really need and aggregate median() function (which I understand is now on the wish-list) and hopefully there is already a standard deviation function (i.e. std() or stdev() etc. I haven't found one so far but have an open email on the list with the inquiry.