Ok, To add to that..
Keep in mind that having a little overlap in the output of the bridge as it switches direction or even all the time maybe can be a good idea!
why you say? by maintaining a minimum current in the output of the bridge, you can help reduce the ill effects of EMV and harmonics by keeping a minimum DC current in the bridge.
If you were driving purely resistive loads, you wouldn't need to worry about this how ever, most of the time this isn't the case.
This made cause the bridge to dissipate more so then with out how ever, better to warm a little tiny bit than keep replacing the bridge.