Blank reminder after sync

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http://androidforums.com – Hi, I have a problem wih my SGSII/4.0.3 when adding an event. When I add an event with google calendar, although I removed any default reminder, after synchronization is done, I see the event on my phone's calendar as expected but there is also an empty reminder that is added to this event ( a bell in front of the event name!!) Any idea why this empty alarm is created? (General)