autoregain is the recovery of hit points when you are saturated. haven't installed 1.2.4 yet, will check if it breaks the addon. about the food...
cant see any error message about FastFood in that log.
delete the server.log in your minecraft server directory and start up the server. then post the server.log here.
that build was compiled using java 7. try this link for compatibility with jdk 6: <Edit by Moderator: Redacted mediafire url>
try my patched FastFood 0.5 tested on craftbukkit 1.2.3 R0.2 and R0.3. downloadable from <Edit by Moderator: Redacted mediafire url>
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