Hi G, I know you only provide limited support but figured you might have run into the same problem yourself and I was hoping you had a solution.
Thing is when I upgraded my vB to the latest 3.7.3 PL1 I was not able to log in to the forums, all I got was this:
Fatal error: Maximum execution time of 120 seconds exceeded in /**/forum/includes/class_cyts.php on line 1953
I then proceeded with disabling all my plugins to track down the problem and found out that I can have all my plugins activated except your gTeamspeak, would you say this is something that happened only to me or did you have the same problem when you upgraded your forums? (if you did upgrade).
Thnx for any help and above all, for this wonderful mod
*Edit*
Seems I am blaming the wrong person here, sorry

It turned out that during my recent server migration the mysql addresses in my database were the only thing the support team forgot to change hence the plug-in here tried to connect to the old database server with obvious failure
this rendered me unable to view any page that had gTeamspeak code executed (for example my private forums where I can see whos online on TS atm)
To perhaps help you in maintaining this plug-in perhaps you could look into a way of reporting this error to the user before he finds himself in some mysterious and endless loop? Im no php/mysql programmer but just to give you a hint that the problem can arise and if so you might want to see some kind of message, hope this helps
and thnx again for this plug-in, I love it =)