PVLE has been updated for OSG 2.0.
What do you mean "That's the first revision of the project" ?. Oh yes ! I forgot: PVLE is born from the split of the BattleLion project (See http://sourceforge.net/projects/battlelion )... It is thus not created from scratch.
So, when migrating from one project to another, the source code has been updated for OSG 2.0, instead of version 1.2. It does not introduces new features, but the code is now up-to-date. :)