Personally I found that the compilation was a lot faster, so there were probably some other changes under the hood.
The previous release had to be patched to use Sablotron, whereas this one detected it straightaway.
To follow up on my earlier post about the problems, the latest release causes a lot of problems with form data submissions, converting strings of text (eg. names ) and numbers (eg. telephone numbers) into illegible junk.
It could be due to some bad programming in the original scripts in use, but as they worked fine on all previous releases downgrading seemed the only reasonable, though unconventional, solution to adopt.