This episode was meant to air in the first half of the season but was pushed back to the second half. You can tell by scenes from this episode appearing in the theme song roll and the fact the Barcalounger in Monica and Chandler's apartment isn't broken yet.
The other bride-to-be Megan Bailey, played by Andrea Bendewald, is one of Jennifer Aniston's best friends and was a bridesmaid at her wedding to Brad Pitt and Aniston was Bendewald's matron of honor at her wedding to Mitch Rouse.
The dress Monica finds at Kleinmans isn't the same dress she tried on at the bridal store, but then the dress changes back to the original dress when she is admiring it on her couch.
Matt LeBlanc improvised his last line in the Ross and Joey story, "Does a bear s*** in the woods?", but it was cut out in the TV episode.
Carcass isn't the only Heavy Metal band referenced in this episode. In the scene where Ross and Chandler (the Joey in a later scene) are talking to Kristen, the record store has a poster for Disturbed in the Record Store window.