I did notice recently that when doing /list, any channels which are +k show * if you're not on them. (At least in the debug output.)
E.g.
[15:29:55] <- :server.name 322 Jigsy #channel 2 :[+tnlk 17 *] topic goes here
Though this just gets truncated to [+tnlk] in actual list output...
