[PRV]

Hi, I couldn't find definitive information on this with a general web search, so my apologies if this is rather basic.

I'm currently on OS v10.4.11, using Omnigraffle Pro v4.2.1. I would like to upgrade my Mac to Leopard, but I'm concerned that I will be forced to upgrade to OG v5. I'm not concerned about the expense but rather compatibility issues that may arise with my OG v4 docs, as I'm in the middle of a project. So my questions are:

Will OG v4 work on Leopard?

or alternatively,

Will I be able to work on my (and my team's) OG v4 docs using OG v5?

Thanks in advance!

-PV