The difference is, as with the combining ligatures above, that the "ü" in the first example is precomposed, and second example is not. The two should be treated as equivalent for search and sorting.

\\textquotedblleft is a LaTeX equivalent & a quick search through compt.text.tex suggests that it might be more robust than using the (very common) double single quote shorthand; in the past, kerning

I've fixed the problem with ligatures in the latest dev branch, but, like before, it won't be available via Reset Translators and Styles until 1.0.4 is out. Alternatively, you can grab scrapers.sql fr