Digital cameras: Question about DSLR sensor dust

Dust happens.

Dust sooner or later becomes an issue with any DSLR... and whether or not there's a dust reduction system in place makes very little difference. Fortunately, removing dust specks is almost always as simple as getting a hand air blower (not compressed air), using mirror lock-up, removing the lens, pointing the opening down, and blowing air in there. Takes moments, works 99 times out of 100.

Modern dust reduction systems (with the exception, to a degree, of the Olympus version) are gimmicks; they are only vaguely effective at best, and, well, if it's not 100% effective, you've still got to clean it manually.