adds double zero on amount

[nouvou]

I update to 10.8 (mac os x) and after that a double zero (00) adds when i enter an amount.
Any ideas how to fix it?

you can see the screenshots

[Angeman]

When does the double zero appears ? Just after you typed the dot ? After you validate with enter ?

[nouvou]

I move from name->comment->date->amount with TAB and when i add the "amount" if i type the dot then adds 2998.00.my-nymber-after-dot (no need to press enter).
If i don't use dot, some times when i type a number (ex 1234) if i do it quickly adds 1234.00 - but if i do it slowly i saw a 12.00.34 or 123.00.4

weird...