Actually that's not a real issue. The Integer editor uses an GUI widget that is limited to Integer values (range 0...2147483647). As Stefan suggested, the user can edit the value using the plain text editor and he'll be able to enter any value.
> [X] +1 | Release Apache Directory Studio 1.2.0 RC1
But you may want to look at the 'uid' JIRA which has just been filled.