Attempted to play and... it seems you're having issues, unfortunately. I'll just have to try a little later!
While on the subject, it looks like there might be a mis-spelling somewhere; I briefly saw an error complaining about a missing biome by the name of 'Tanitbiome'.
Anyway, looking...
Version: 3.00, but Recommended version displayed issue as well before I switched.
Usage of Bonemeal (possibly attempting to let them grow naturally- have not yet checked that) on Spruce and Birch saplings causes displayed name of sapling to switch between the sapling in question and oak...