I can actually confirm this now, while starting my local test server on R4(1938) server log shows the following:
14.02 07:26:13 [Server] INFO git-Bukkit-1.1-R3-b1846jnks (MC: 1.1)
I decided to do a little in game testing and run through some bug fixes to see if they held up. Bukkit 1846 had an issue where flaming arrows still hurt players even if PvP is disabled, which was fixed in Build 1938. I tested that with Bukkit 1938 with no mods, and it was fixed. However, once you drop mods in the issue returns.
Again thank you to the poster for this information, it's very helpful. As it is right now, your kind of updating, but not really fixing anything, which is...interesting.