Apologies for the delay ( I recently migrated my email and subsequently it was all marked as read, I must have missed over the forum notification ). I'm looking into the issue now, benbrooks. As Ploo said, could you please provide the full table structure? In the case of an Overflow condition, MySQL should be returning an error, and UTime should therefore be mentioning it.
Regarding the Boolean Concatenation error, it seems to be related to the MySQL Query itself. This tells me that MySQL probably IS handing off an error to LUA ( due to the Overflow condition ), but my code isn't handling it correctly. Something that needs to be fixed, certainly, but seems to be a symptom rather than the problem.
Like I said, please post your table structure here, and I'll be able to provide a better answer. Thanks!