The attachment icon in the calendar could be improved.
Calendar entry with attachment and a short title.
The attachment icon is visible.
Calendar entry with attachment and a long title.
The attachment icon is not visible.
I think it would be better if the icon for the attachment is visible all the time in case an attachment is being attached. Like that you would see which entries have an attachment and which not. You ony loose about 2-5 characters (in maximum) of the title but this isn’t a big deal in my opinion.