1- Adding an all-day event; Edit Event page defaults start date/time and end date/time as the same, therefore event does NOT display. Have to unckeck 'All day event' and set start time as 07:00 and end time to 17:00 on order for event to display. Sorta negates 'All day event', doesn't it?
2-Repeating event; ai1ec offers much better flexibility for entering repeating events, except that some occasions need more flexibility (ex: Easter Sunday is variable; Labor Day is the First Monday in September, and there are others. Flexibility to accommodate these types of repeating event would be nice.
3-Just found a third problem. I entered Mother's Day (second Sunday in May) as a repeating event, but when checking future years, event seems to be glued to the date, NOT the day, so in 2014, it displays on Tuesday and in 2015, it displays on Wednesday.
Developers need to look at how repeating events are processed.