Why do some/all channels not show JOIN, PART, QUIT or nick change messages?
The most likely reason is that ChatZilla has automatically enabled “Conference Mode” on these channels, which occurs when the number of users exceeds a configurable limit (default is 150 in current versions). To check or change the limit, open the ChatZilla preferences window, and check the Appearance tab – it is labeled “Conference Mode limit”. You can set this limit globally (select Global Settings on the left), for a single network (select the network), or individual channels. Conference Mode is automatically enabled and disabled as the number of users changes, but only when the count is at least 10 above or below the configured value (to prevent it changing too often on channels near the limit). You can use any limit you like, including the special value 0 for never hiding join, part, quit and nick change messages, and 1 for always hiding them.
