gajim does not encode angle brackets, causing stuff in angle brackets to get lost on other clients
When sending something like this: foo <bar> from gajim to another gajim client, only "foo " appears there. The reason is probably that jabber is xml-based and the <, > should be encoded. When sending angle brackets from kopete or pidgin to gajim, they appear entity-encoded in gajim, so gajim needs both en- and decoding of angle brackets.