Multiple hu.wikipedia users reported that their watchlist is not working (they are getting a white screen of death with an internal server error). The error seems to be specific to a handful of users, and they are getting it consistently every time as long as advanced recent changes are enabled.
Here is an example of such a request:
URL: http://hu.wikipedia.org/wiki/Speci%C3%A1lis:Friss_v%C3%A1ltoztat%C3%A1sok
Time: Sun, 12 Sep 2010 16:10:05 GMT
IP: 84.3.52.70
Status Code: 500 Internal Server Error
Version: unspecified
Severity: minor