Yesterday it was 4 crashes in succession trying to do the Wolf Crossing fight in Drizzlewood. I was running Launchbuddy but with only 1 account. Gave up and went to bed.
Today had no issues this morning. Played for 5 hours on both main and later on 3 accounts / launchbuddy. Just got back at 3pm though and have suffered 4 more crashes trying to finish my wvw dailies. The first 3 times I was unable to even load into BGBL without a crash window appearance. The 4th time I loaded into desertBL and swapped to EBG and played for 10 mins before the game went poof again.
Oh and for completeness in responding to previous suggestions this thread, :
1) No arcps installed
2) No beta characters created
3) yesterdays crashes the disable skill highlighting was off, but today it was switched to on.
So nothing above explains the sudden failings to run a stable game lately.
Edit - on restarting I got a message saying the last time the game crashed do to an error in "in-game data" and asked me to repair the data archive. That is in progress at the moment