IE8 - Nothing...

Geolocation field doesn't seem to work at all with IE8 - tested IE9 + FF + Chrome and works OK. On IE8 no map is displayed and nothing can be saved into the field. I've tried with HTML5 module on and off. Below is what IE8 is telling me...

Webpage error details

User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; BRI/1; MDDC)
Timestamp: Mon, 17 Oct 2011 07:52:00 UTC


Message: Object expected
Line: 221
Char: 13
Code: 0
URI: mysite.com/sites/all/modules/geolocation/modules/geolocation_googlemaps/geolocation_googlemaps.js?lt798r