I tried to search for this and apparently there isn't any related features related to user timezone offsets which sorts of makes me think this isn't a localization bug but anyways:
At the very point of writing this, it's 18:37 local time (I'm in Helsinki, Finland so that's EET or UTC/GMT+2h). The
Summary tab shows my
Recent activity (this URL to be exact) range as
2009-11-18 16:19:15Z to 2009-11-18 23:59:59Z
However both ranges (Top 5 Posts and Most Recent Responses) show
(nothing in this date range)
which is clearly wrong since I've gained reputation during couple of last hours and I can actually find out that rep bo going to the
Reputation tab, clicking yesterday, then back to today which adds range params to the URL (click here for example) and if I now click
Summary tab, a whole bunch of params are added to the link (click here for example) and everything works - until I return to the Summary once again by my default means by clicking the envelope icon.
This has occurred repeatedly (possibly daily) for some time now, always during this time of day.