I should probably have released one more sneakypeek before pushing 0.983. I've gotten a couple of reports of a crash on launch. Haven't found the problem yet, but it's totally reproducible, the stack traces look the same, and it's almost certainly a dumb error I could have caught by programming more defensively. On my list for the next minor release: more robust and informative error handling.
(The next major release, where I get rid of the long launch, is still a long ways away.)
UPDATE: Found it.