'Note': proper html escaping
'Note' processing rules
Protocol format - plain text
Sipe format - html (all incoming plain text should be html-escaped)
Pidgin format - html
Communicator format (2007 R2, 2007, 2005) - plain text
Luck of proper html-escaping caused WIERDEST artifacts
in Pidgin UI like renaming(!) contacts in buddy list,
replacing contacts by group names in UI.
Test case: ask some Communicator user to add < (less symbol) in his note
and see the artifacts in your Pidgin UI.
Example test Note string:
10 < 50