I am working on a german OS X. Anytime I enter an amount with decimals it gets automatically multiplied by 100 (comma moves two characters to the right).
I enter: 13,51 and get € 1.351,00
Then I go to the right location for the comma and enter it a second time: € 1.3,51,00
After the field loses focus, the right number is presented: € 13,51
This is of course a real problem for data entry.