Updated: The feature has been re-enabled.
Just to let you know, the quote notification has been disabled for the moment. After a few members reported issues, testing found the e-mail notification was fully out of action and the PM notification was a hit-and-miss. A few hours of debugging and testing failed to fix the issue. A replacement is currently being coded-up, however, it won't be turned on until the forum is more quieter to minimise the chance a possible outage would affect members.
To turn a negative into a positive, this is a chance to rewrite the feature itself. If you have any suggestions, ideas or feedback on the feature or the way it could act differently, post it here. No suggestion, idea or feedback is insignificant.