inspircd's m_spanningtree forwards messages blindly regardless of burst status. in other words, if you send a PING to a new server, in response to a SERVER message being received (to determine if it is truly synced or not), that PING will be dropped by the new server as it hasn't received a burst yet.
see logs in #37 for details.
m_spanningtree Burst to a new server before introducing it to the res…
…t of the network
Fixes issue #103 reported by @nenolod
@nenolod fixed, please test with 2.0 git head if the issue still occurs with atheme