Oh poop. It seems my hosting company made exonome.com more secure, probably by implementing jails for the web processes. Which I can't fault them for, but now my scripted pages can't find commands like grep and awk, and those are what I relied on to put all my pretty pictures on my pages.
I still can execute Perl scripts, so that would be my work-around: implement what I wanted done in Perl instead of as piped UNIX commands. Too bad I don't know Perl.