Ok, so here is my theory about the problem:
uncaught exception: [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIDOMWindow.getComputedStyle]" nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame ::
maps.gstatic.com/intl/en_us/mapfiles/api-3/8/6/main.js
:: lm :: line 62" data: no]
initialize(index="initialize", value=function())script-1.2.js (line 30)
each(object=Object { extend=function(), initialize=function()}, callback=function(), args=undefined)joms.jquery.js (line 649)
initialize()script-1.2.js (line 28)
(?)()script-1.2.js (line 3319)
resolveWith(context=Document hotspots, args=[function()])joms.jquery.js (line 1008)
ready(wait=undefined)joms.jquery.js (line 436)
DOMContentLoaded()joms.jquery.js (line 915)
[Break On This Error]
value.initialize();
script-1.2.js - is part of jomsocial. Jomsocial also includes jquery -> they do something that breaks google maps -> as you can see from the output the problem starts from the jquery code.
Can you for example try to disable the mod_hello on the hotspots page to see if this will solve the problem? (i think that the mod_hello is the only thing that includes the jomsocial js right now, but if it isn't try to disable everything that includes it - just for test - we need to isolate the problem first before I can offer a solution)
Regards,
Daniel