Hi,
Just experienced yesterday. I defined a linked 'Quote' style many years ago that is now refusing to change the character style, instead it just changes the whole paragraph. Under the 'Modilfy style' dialogue the 'Style type' is greyed out.
I'm currently working on a massive book with 15 sections (separate files) and multiple chapters, with the same thing being experienced across all the the files, so I assume the stylesheet has got screwed.
I suppose creating a new style, select all instances of the old style and then reformatting should work, but I would like other thoughts before I do this as it's a massive change that could create further problems.
Thanks