It seems that text format rules, which are defined in a FrameMaker EDD, are lost when updating text insets.
Open "test.fm". Text "some text" is bold.
Click on "some text". The window "Text Inset Properties" appears. Press the button "Update now".
Bold formatting is lost. At least, in the version 7.0p492.
Anyone could please test it in other versions of FM?
A package with test files: http://uucode.com/blog/wp-content/formatting_lost_on_inset_update.zip