In Google I create an event called Test for the date of 15/8/2014. Ticked the All Day box. So it is for one day only! Do a sync and the sync log says this.
Added Google calendar event Test starting at 2014-08-15 00:00 and ending at 2014-08-16 00:00 to the system.
As you can see it adds a calendar event in AwareIM for two whole days not one. If the Google calendar event has specific times set then it works fine.
Cheers Rod