Problem solved.
The PEQ database from august of 2015 contains spell IDs that go all the way up to 49999. I amended my SQL export statement to only export spells where the id is less than 45000 (as indicated in this post:
http://www.eqemulator.org/forums/sho...42&postcount=8)
Magically, everything works now. I'm not sure what client can support spell ID's of up to 50k, but I'm using the ROF2 client, which stops at 45k. My initial assumption had been that the latest client would be capable of handling anything from the latest database, and that was not the case.