Possible bug:

Reported value of hashrate at CgminerStatistics per GPU (from graph)
is not the actual one reported by cgminer and the worker page (with "GUI" cgminer).

Example: one of my miners has 4x 7950 cards - each one does pretty steady 2.45Mh/s X15
(reported by both sgminer and CGminerMonitor worker page).
The graph reports 2.35 very consistently.

Suggestion: There might be some faulty conversion - x1024 instead of x1000 or vice versa?