When tagging an item during editing it is unclear how to seperate tags. Semi-colon? Colon? Space?

When you use the wrong seperation an error is shown _after_ you switch focus to the next input field. Worse: the (appearently badly formatted) tags are wiped instead of giving me the option to replace the bad characters it found.

The number of tags allowed is unclear too.

It turns out that tag-field is completely whacked. At a 30(?) characters it assumes you've meant that set of characters as a tag. Unless your previous tag (delimited by an [enter] as it turns out) has a 10 or so characters too. Then it cuts of your next 30 character tag and deletes it.

Feature request: expiration dates on items.