Hi,
I think I found the bug a little while ago but I vaguely recall it being a complex fix. As a result I decided to rewrite the quest system which obviously has some pros/cons.
I.e. in the short term, the bug's going to be around but, in the long term, it'll be fixed along with a number of bugs and will be easier for me to work on, should more bugs crop up.
To be honest, I've not worked on it the last week and a bit. Been juggling other projects.
I'll take another look at the bug later this week and see if it's possible to whip something together in the short term. If not though, will just be a case of waiting :)