有 server 被摸進去了，參考「Server issues」：
Earlier today the freenode infra team noticed an anomaly on a single IRC server. We have since identified that this was indicative of the server being compromised by an unknown third party.
因此建議大家更換 channel key 與密碼：
Since traffic may have been sniffed, you may also wish to consider any channel keys or similar secret information exchanged over the network.