I am currently using v8.1.02 Free (running under Linux) and notice an incorrect week-number when generating a report.
Like "Opened/Closed Requests per period" setting Grouping to "week".
It is skipping week 45 .. so you will have something like 43, 44, 46, 47 (where 47 is week 46).
And it also shows in the graph generated...
Am I the only one, or is this a 'small' bug? I have no clue why week 45, as all previous weeks went OK.