What nightly should I use?
1359 is pretty stable, but any, really.
Can I do the transcoding with the stable 0.2.4 release by building from source?
Nope. Has to be nightlies.
To track this down, go into the web config and set a log file. Set the debug level to 9, then save. Then connect with banshee and let it die.
Gzip up the logfile and email it to me at [email protected]. Or, if you think you see the relevant part, you can post just that part here.