The protocl jumped on this version of mythtv, so mythweb doesn't work now. I suspect other plugins may suffer. Reproducible: Always Error at /var/www/localhost/htdocs/mythweb/includes/mythbackend.php, line 172: Incompatible protocol version (mythweb=37, backend=38)
try the newer revisions in the tree of mythvideo and mythweb. 15710. Fixed.
Ugh, now it's gone the other way, and mythtv itself needs another update. Error at /var/www/localhost/htdocs/mythweb/includes/mythbackend.php, line 172: Incompatible protocol version (mythweb=39, backend=38)
Just bump it locally for now. Pick a revision number and copy the ebuild to that.
Actually. The change to protocol version in mythtv was done in revision 15701. The change in mythweb and mythvideo was done in 15702. mythtv-0.21_pre15718 has been in the tree since today at 15:45 UTC (10:45am EST). Just use that.