I'm not positive what exactly causes it, but it seems that editing certain text, not sure what, completely erases the text in the field file "las4_42". This is the scene immediately after you defeat JEVONA Synthesis, so in game when you defeat her this causes a crash. This of course can be currently fixed by simply reinserting the original field file with Highwind, but it's still troublesome and might cause more problems than just that.
Another problem, possibly due to symbol hotkeys/buttons/whatever, is during the scene where the party is detected on the train and has to avoid the security checks. Where it would normally say "Car #1" for example, instead it will have "Car [odd symbol here]".
The editor crashes frequently when doing large amounts of editing due to memory problems. Yet if you close and reopen the program, you can resume editing as much as you like so it can't be an issue with the file itself.
Other than these three things, I cannot think of any other bugs.
As for ideas, is it possible to modify default names in the current version? I attempted to edit "Aeris" to "Aerith" using various techniques but none worked. Perhaps a task for Meteor, but if it's possible to implement into Loveless, all the better.