Thanks for the quick response. To answer your questions, there were no visible errors at all. The snippet call is the one from the Default Template which looks like this:
<li id="dropmenu"><a name="dropmenu"></a><h2>Pages:</h2>
[!DropMenu!]
</li>
I have one of the sub-pages set to cacheable, one to not, since I wanted to test both options. The home page is marked as cacheable. Setting the stopOnNotice to false didn’t seem to generate any errors that I could find.
As far as the MaxiGallery issues, I forgot to mention that somebody was able to help me with that already. I only mentioned it in case the Strict Mode issue was relevent here.
EDIT: I also tried using [[DropMenu]] which didn’t work either. Then, just out of curiosity I tried adding a bogus snippet reference [!TestBleh!] and it had the same behavior. No errors, and it gets stripped out of the source. After that I did file search for documents containing "DropMenu" in it, and the only results that came up where in the cache directory. Is it possible that I somehow don’t have the DropMenu snippet installed?