Have ther been changes to keep-together in Version 2.3

Hi there,

we recently upgraded to FOP 2.3 from 1.1 and since then the 
keep-together mechanism isnt working as it used to in earlier versions. 
In Version 1.1, 2.0, 2.1 and 2.2 the output is as expected and the 
specified content is kept together. But when i transform the exact same 
xml with FOP 2.3 the content is splitted on two pages.

Have there been any changes to how the mechanism works in FOP 2.3? I 
could find any information in the release notes or any other source.

Thx
Michael