Re: Is something going on with xmaps?

put some alert() commands in there to detect when it is calling the
infowindow open code.
they are useful not only because you know it has hit that bit of code,
but it also stops it running until you click OK.

what kind of listener are you using to open the infowindow ?
marker ? ie lots of listeners, one per marker
or map ? ie one listener, then it works out which marker was clicked
and opens it's infowindow

I would recommend the map method.