I am no expert either, but yeasts can give off some bad odors from time to time...lots of it depends on temperature and available nutrients(or lack of) during fermentation.
I wouldn't worry about it.
Wine-Down Brewing and Winemaking
Drinking White Zinfandel, Orange Hefeweizen, Apfelwein, Jawbreaker Pale Ale, Brown Ale
Ferm1-Blackberry Merlot Ferm2-Apfelwein
Ferm3 -Apfelwein, Ferm4 -Skeeter Pee, Ferm5 -Jawbreaker Pale Ale