Need information on where/how restrictions are stored

[sugeneris]

I know that proper admin/API functions for dealing with the IP restrictions are on the todo list, but I need some currently-usable information on how to try and dig this information out myself. Client is reporting several people he's sure aren't sharing getting locked out of the system, and I can't figure out what's being logged. Is there any published information on this? He says he reset the logs and it's still not letting at least one of them in. Incidentally, there's an unacknowledged thread from September that sounds a lot like this situation. Maybe there's actually a bug in here?

I've semi-figured out that these seem to be rows in the wp_options table with option_name of "_transient_timeout_s2m_ipr_[some_hash]" In my case, resetting the logs from within the admin is making absolutely no visible change to the database, though. Is it safe to just trash these records from the db directly?