Haven't noticed this until today, but it seems like the default currency for Slovenia has been set to Euro in Windows Vista RTM. Now, we're about to change our Slovenian Tolar (SIT) to Euro in about two weeks (1.1.2007) and we're still using Tolars at this moment, so this is kind of early to set such defaults.
Interestingly, this default has only been set with the fresh install of Windows Vista RTM. When upgrading to RTM from previous versions (RC1, 2, ...), the regional currency remained SIT. However, resetting to defaults will set the default currency to Euro:
If you've already installed Vista on your working computer and your regular daily work includes financial applications, watch out for these settings to avoid any surprises...