You need to manually set the DecimalSeperator to '.' (and the ShortDateTimeFormat to 'dd/mm/yyyy') as the first thing you do in your app.

There are a few other locale settings you need to set, but those are the main ones. (Better get that done quick and upload it to IGF)

pstudio :
No testing has been done on Vista yet, so if there is any additional info you can provide if would help