During the setup our combobox for the timezone is too small to hold the longest string
for GMT+1 ("Amsterdam, Berlin, ...., Vienna").
So that "Vienna" is cropped unintentionally.
As far as I have checked, GMT+1 is the longest string ever used in there.
for the record: even in ros'es own datetime.cpl the combobox is significantly larger and the whole string fits into it, so we could theoretically pick the length from there, and apply it in a way that the syssetup dialog still looks good from an aesthetics point of view.
I tested ros in german localization here, I would guess that it also doesn't fit in the english version, but we should enlarge for it being big enough for the localization that uses the longest string.
For the record: This is broken down into SVN stone age definitely. I never remembered it being big enough for that string. I was just too lazy to file a ticket for it up to now.