1.2 included an update to RMSDK 9.2 which improves the typography by including (among a lot of other things) a hyphenation engine. If for your epubs you don't want the hyphenation engine (and the better typography, etc...), you can force RMSDK 9.2 to use the 'old' 9.1 text engine by adding adding the css attribute 'adobe-text-layout: optimizeSpeed;' to a body selector ie
Code:
body {
... other attributes ...
adobe-text-layout: optimizeSpeed;
}