Read this vikster
taken from MTBR.com
Quick-release skewers can be used on frames with track fork ends or horizontal dropouts, but care should be taken in selecting what type of skewer to use. Modern alloy skewers usually cannot be clamped down tightly enough to hold the rear wheel in place. This may lead to the wheel slipping under load. Older, heavy-duty steel skewers like early Shimano XTs seem to work the best for people choosing to use a quick-release on the rear. Adding chaintugs would also reduce the likelihood of slippage.
and sheldon -
Conventional wisdom is that you need a solid (nutted or "bolt-on") axle hub for fixed-gear or singlespeed use, and that a quick-release will not hold the wheel solidly enough in a horizontal fork end. This is not true, however.
Since most newer bikes have vertical dropouts, people have gotten used to wimpy aluminum skewers, and often don't adjust them as tightly as they might.
If you use a good quality (Shimano is the best) skewer , tightened securely, it will hold just fine in any type of dropout or fork end .