I'm not sure wether the problem lays here or on the BOINCstats site ...

http://boincstats.com/en/stats/134/host/list/12/0/0

shows the two top hosts in this project both with 86400 daily credits for yesterday.

86400 is 60*60*24, a value defined in the core client as the limit for short time debits - it would really be a strange coincidence, if both top hosts had exactly this value as their daily output.

I currently don't have an idea, what might cause this, the host detail pages on BOINCstats (best 10 days and graphs) show some higher values - but it might somehow be related to the server side BOINC upgrade.