Thanks for the reply, I also did a little testing.
Made a Skeleton on 1.4.9, then tried loading him on 1.5.0. Got a warning about using an old version, option 1 was to download all the old data for previous version, (and just use old version, I suppose), or to proceed anyways.
I chose the option to proceed.
It seems that it's sort of broken if you just proceed
For example, I had put some points into the Skeleton talent on 1.4.9, then noticed what my stats were for Str and Dex.
I then loaded the character in beta 1.5.0. The talent tooltips were updated with the new stat scaling value (gives more Str and Dex), but my actual stats remained unchanged, as if the game logic didn't re-evaluate my talents and re-apply any changes that affected my character. I also tried saving/reloading, and also changing zones, and the stat bonus remained unchanged.
In conclusion, it seems kinda borked. However, one would assume it wouldn't be too hard to fix, just need to do a logic check on all talents and re-initialize their effects; I wonder why that isn't being done. Hmm...
Anyways, I think I'll also wait until 1.5.0 is actually released before I play any more.