Inserts on Output Track have disappeared

That post referenced above definitely solves the issue, but I've found that the prelisten channel actually has its own channel strip and is not 'the highest audio channel' as Bee Jay explains (sorry Bee Jay if I'm misunderstanding what you're saying). If you select 'All' in the top bar of the mixer instead of 'Arrange', you'll find the dedicated prelisten fader.

Yes, it is usually named "Prelisten", and the actual audio object is usually the highest audio channel (eg, 256) depending on what you have your track preferences set to (as opposed to Logic 7, where it usually defaults to audio object 1, very inconveniently.)

The way Logic works is that every channel strip has a number, from 1 to however many audio objects you have, and related to the maximum number of tracks preference setting. The prelisten object is set by Logic to be the highest available audio object (ie channel strip) available to the system, so as not to interfere with regular work on the low numbered audio channel strips.

My prelisten channel strip, in a default L8 song, is on audio object 256.

The manual explains this, if you want more info.

Yes, it's a common issue.

http://discussions.apple.com/thread.jspa?threadID=1172793&tstart=50

Thanks for that good clarification.