As seen in #97 and on Discord, a few people ran into issues as a result of their profiles containing some errant non-numeric characters as part of the width/height segments in {img} tags.

It'd be a good idea to validate the profiles on-save and prevent users from saving broken profile texts, with a callout message notifying the user of the problem and (ideally) colouring the bad replacement in in red and scrolling to it.

This shouldn't be a blocker for the next (1.3.2) release since it'll take some time.