Subscription acknowledgment incompatibility with xmmp?

Using Gajim and demanding authorisation from a jabber-account hosted on a wildfire 3.0.1 server I got >100 notification windows. So I thought that it would be a Gajim issue and had a look at its bug-database. describes exaclty what I get when authorisation is granted for a jabber-account. So is this a wildfire-issue of incompatibility with xmpp?