Steps to reproduce:
- Create a translatable page with at least one section
- Mark it for translation
- Translate a unit to some language
- Make change to the translatable page with that section you translated
- Mark the page for translation, do not check "skip fuzzy" checkbox
- Update the now fuzzy translation to "something else"
- Now mark the updated translation with !!FUZZY!! and save
Observed: the translation page still contains "something else". By normal rules it should contain the source text.
I didn't have time to check, but steps 4-6 could possibly be skipped with the same result.