saving xlsx file as xls changes currency symbols
 

we use multiple currencies on same worksheet: USD, GBP, EURO etc. (£5.00
$5.00 ‚¬ 5.00)

all looks fine in excel 2007, but when the file is saves as xls all currency
symbols appear as ‚¬ - category currency symbol ‚¬ dutch netherlands - and we
are in UK locals are UK...

Any idea what is causing this this behavior? it is impossible to see in the
xls which currency is which...