[Koha] Koha 1.2.3.

Hello, could anyone kindly shed some light on the classification entry for journals, etc. We are using Koha 1.2.3. and find that numbers can only be used in class, and letters (3 only) can only be used subclass. Can anyone suggest have they have overcome this when you are cataloguing journals etc and have Vol 3, No 2, etc, and perhaps therefore need numbers and letters together in the one class. Also does anyone know when Koha 2 will be out. Thanks kindly Heather