[Icecast] 403 errors to source client / number of sources accumulates / ogg vorbis

[MultiParadigm Corp.]

Using two different source clients on fairly recent Icecast KH,
and ONLY on ogg vorbis streams
source_client_connections and source_total_connections keeps increasing
till it hits the limit,
then the ogg streams quit working.  Sometimes other streams quit as
well.
A restart is then needed.
Any ideas?