Why would 0.7.2 not work???
However: the groups should work even with 0.7.1 for jOpenSim 0.2.0. Only the included profile module is not compatible anymore with 0.7.1. It should work with the "old" module though, available for download
here
.
One reason that the groups and/or profile might not work is, that you have set the value "error_reporting" in your php.ini to "E_ALL" or "E_ALL | E_STRICT" but not to "E_ALL & ~E_NOTICE" as it should be by default.
Of course, this is not a mistake in your settings but an issue in my component. I'm currently working hard to get rid of all those notice messages in jOpenSim and I hope, that 0.2.1 will work even with any settings (except "E_ALL | E_STRICT").
Greetz
FoTo50