(this image contains no private info, so it's fine to be public)
This was discovered while testing r879653, but it is reproducible with or without that patch. The cu_log table contains a lot of more rows:
wikiadmin@10.64.48.35(testwiki)> select count(*) from cu_log; +----------+ | count(*) | +----------+ | 1274 | +----------+ 1 row in set (0.002 sec)
The only difference between the displayed entry and the other entries is that for @Zabe's log, cul_reason_id and cul_reason_plaintext_id is populated.
This is reproducible at mediawiki.org as well (wmf.19 as of writing).