ERROR ringct src/ringct/rctOps.cpp:264 ge_frombytes_vartime failed at 264
It is preceded with a date, and then a 12-digit hexadecimal number, which I wasn't sure was something personally identifiable, so I left it out. It starts with 7bf and ends with 700.
There are occasional warnings or errors in the daemon log that are really unimportant from the node owner's perspective. Is this one of those? Perhaps this is from a transaction that someone broadcast from an old incompatible wallet? It would be nice to know that this message was about someone else on the network, rather than something wrong with my build.