Creating an account in 1.16wmf4 test2 using Special:UserLogin doesn't create a log entry (Krinkle and Platonides accounts), as opposed to creating it by browsing (such as Reedy) where the 'Account created automatically' entry is added.
However, in 1.17wmf1 (deployed to test2 @ 20:07) it looks even more broken. The last entry in the user cretion log is at 20:06. Later creations are not shown. Whether they are created via Special:Userlogin (Hprmedina, Laura Fiorucci) or by cookie (Manuelt15).
Version: unspecified
Severity: normal