Hi eNGiNe,

At a guess, I'd say the Style definition is corrupt. You might need to delete and re-create it. If you delete the Style, everything using it will revert to 'Normal'. However, if you create the new Style first (with a different name), you can use Find/Replace to change all content in the current Style to the new one. Then you can delete the old Style safely.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]