@Colin – what is the version of InDesign where you see the problems?
I just opened your IDML in InDesign CS5.5 and I can see that the GREP "no break of start of line" will not be honored after doing the "New Line Style". So yes, something has changed…
And that line style will break the GREP even if you do nothing to format the text, even if all features in the used character style are set to "ignore" formatting (I did that, because I wanted to know, if the feature Drop Caps would do the harm).
@Colin – and it will not change from showing the effects of the GREP Style "no break of start of line", if you are doing local formatting in the first line of a paragraph (introducing a new text style range, technically spoken).
But definitely with the feature "Line Style" for the first line the GREP Style will not kick in.
Does a redraw of the text will help?
No. If you open an IDML the text always has to redraw…
It seems you found a bug…
Looks like a bug to me too Uwe. I've submitted it via Adobe's Wishform.
@Colin – I thought, I could make it work, if I introduce another GREP Style BEFORE the one that is not working: A GREP Style, that is doing nothing (applying the character style "[None]" to a character like "§" that is simply not in the text. Did not work.
Another attempt with InDesign CS5.5 OSX 10.6.8: I made a new paragraph style BASED ON the one that is not working. Changed nothing in that new one, just let it be based on the not working one.
Now: THAT IS FINALLY WORKING! But in a different way I expected…
"Will work" is based on "not working".
Here all GREP Styles used in "Will work":