It appears that X4.0.1 (which I use with Word 2007) also has that problem. I very much wish that EndNote will soon offer a check box that lets you decide whether or not to add a period at the end of a citation or not. I am spending hours after hours generating my citations over and over (without ever saving the resulting file) in order to find the best solutions (or rather workarounds). Given the severe problems connected with editing output styles, one should not have to edit anything in order to obtain the desired results; that is the software’s job.