QString::localeAwareCompare() sorts incorrect

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I originally posted this bug at bugs.kde.org/show_bug.cgi?id=255398 because kmail displays some names in wrong order. I was refered to this bugtracking page because localeAwareCompare() seems to be source of this issue. I am not into C++, so I could not check out if it really is a bug in localeAwareCompare(), but maybe someone of you could do that for me (and if it is, fix it).
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The Issue:

A set of names like "Smith, Adam", "Smithers, Adam", "Smith, Eve" and "Smithers, Eve" should be sorted like this:

1. "Smith, Adam"
2. "Smith, Eve"
3. "Smithers, Adam"
4. "Smithers, Eve"

But instead it is sorted like this:

1. "Smith, Adam"
2. "Smithers, Adam"
3. "Smithers, Eve"
4. "Smith, Eve"

I assume, that whitespaces and commas (as well as other non alphanumeric characters) are ignored during comparison, so that "Smithers, Eve" and "Smith, Eve" becomes "smitherseve" and "smitheve" and thus be sorted the wrong way.