I'm currently the GM of a fairly long-running SR game. We started about two years ago, and - modulo minor gaps - have been playing weekly with the same characters since then. With the release of SR5, we've hit a bit of a snag that's only cropped up now: How on earth do we deal with the content that's missing from SR4?
Specifically, there are a lot of things (lifestyles, some of the advanced augmentations, martial arts, positive and negative qualities) that characters had that are (at least presently) missing in the current edition. It wasn't a huge problem earlier because we were in the middle of a fairly large "away from home" campaign when we swapped editions, but now the players have finally returned home to Seattle to find that... well, nothing's the same.
How have you handled characters suddenly missing core parts of their builds? Do the majority of the folks here start afresh with the new edition, or do you rebuild the characters with the rules? Are there people that are working on band-aid fixes until the extra books come out?