AbigailII: I agree that including DST conventions in the time zone setting would be a nice feature. And it's probably true that some users would be confused and complain. But then some users are already confused and complaining.

But as I see it, the absence of this feature is not the main problem. The main problem is the mismatch between the interface and the functionality of BK's time zone setting. The various options on the Settings page are all described as fixed offsets from GMT, but they are implemented</a> as fixed offsets from Czech time. Thus, whenever the Czech Republic is on summer time, what you set is not what you get.