If you enter a negative value for the “Next value” of a sequence auto-generated field, the dialog accepts the value, but when you go back to the dialog, the negative number is displayed as its positive equivalent.
The value has correctly been saved as a negative value, but it is displayed incorrectly as a positive value. This can be confirmed by pressing the “Refresh” button. Doing so will restore the “Next value” field to the negative value initially entered.
I’m using the latest Beta release, 2.0 rc3. My backend database is postgresql version 7.1.3 (old, I know, but my DB host won’t upgrade it).