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Now several sources are suggesting the culprit is a bug inside iOS 5 -- meaning that anyone who upgraded, even on an older iPhone, may be affected.
So we want to hear from the legions of iPhone-toting Mashable readers. Have you had a problem? If so, which device and iOS were you using?
Take our poll below, and let us know the specifics of your problem in the comments. We can't promise to fix it (although turning off time zone location services does seem promising as a temporary solution), but we do hope to help settle the question of whether this is a hardware or a software issues.
iPhone Owners: Have You Had Battery Problems in the Last Two Weeks?