0. Open Firefox
1. Open contract creation page
2. Fill the 'Amount' field with value '123'
3. Delete the last digit in the value of the Amount field
expected result: digit was deleted
actual result: digit wasn't deleted

4. Fill the 'Amount' field with value '123.12'
5. Click Save button
actual result: 'Amount' field does not contain a value
expected result: 'Amount' = 123.12

The problem is reproduced for all numeric values (in FF)