Justin,
Can you confirm for me that all the ripped songs are being placed in the same folder? In other words, are all the songs ripped from, say, the "Lilith Fair" disc 1, are all in the same physical directory? If they aren't, then that's your problem. On that note, what are your "File Naming & Location" settings? I'm sure you know where those settings are, but just in case, look under "Tools", "Options", then "File Naming & Location". What do you have listed for the Directory and Filename rules? If you have "[Artist]\[Album]" as your directory rule, and you fill in the individual artist name for each track before ripping (either by manually filling this in or via the YADB info), then that's your problem, because what MC is doing is placing each song in a separate artist folder based on the individual artist's name. Thus, since each song is in a different physical folder, MC doesn't see it as a "(Multiple Artists)" album. I know, I know, it sucks, but there are easy ways around this. What I do, before I rip, is I make sure that I have the "Album Artist" (not the auto one) column viewable in the window that shows the tracks on the CD that I am about to rip. I fill in each track's artist in the "Artist" column, and then type "Various Artists" in the "Album Artist" field. By doing so, the "Album Artist (auto)" field will be filled with "Various Artists" (whatever I type in the "Album Artist" field).
Then, you have to make sure that your "File Naming & Location" Directory Rule says "[Album Artist (auto)]/[Album]" so that all the songs will go into a physical directory called "Various Artists", and then in a "Lilith Fair..." subdirectory in the "Various Artists" directory.
Let me know if that's more confusing or if it actually helps.
Wobbley