I have jsut installed the latest version and the price problem still seems to be their.  I have my portal language set to English and I would like to display prices in € (I realise that this is not currently possible).  but now I cannot enter any fractional prices.  i.e.   neither 180.23 or 180,23 work.

Hey Scott,
Just to clarify.  I think the format of the price field should reflect the users locale, it's just the currency symbol that should be invariable. 

I don't think that my scenario, admin locale <>  currency display locale, is that unique.  Your solution to override the portal currency symbol would work fine.