Viewing bb2.rss with Firefox livebook mark

Using Firefox 1.0.7 to view bb2.rss seems to have stopped working when I upgraded to 4.2. I am running a snapshot from 04-25-06. I tried Firefox 1.5 and that didn't work either. AKregator is able to read in the alerts OK for bb2.rss. I just added --rss to my 4.1.2 production server and it works. I don't see anything obviously wrong with the format of the .rss files. Can anyone confirm this behavior with Firefox and 4.2?

hobbitlaunch.cfg:
CMD bbgen $BBGENOPTS --report --rss --max-eventtime=1440

I tried --rssversion={0.91|0.92|1.0|2.0} but none of the versions seems to work.

Thanks,
John