In Newsfeed, event icon's url is http://myowsite.com/...ent/event_icon_1.jpg, which doesn't exist at all, the actual thumbnail icon generated by event plugin is tailing with a string of hash code like this event_icon_4e76cc6201d21.jpg
I was to late whed I digged a bit more on this and I already posted my isuue on forum. I think my newsfeed has to do with this cache issue too. It didn't come with 1.3 update or it will come in the next one?