Getting error application corrupted on Motorola devices

We released an app on the Android market and all our test devices work great but people are saying that they are getting an error that the application is corrupt when they try to open it. It seems the error is only occurring on Motorola devices such as the the Droid and Razr. Does anyone have any idea what could cause this? [import]uid: 156379 topic_id: 30640 reply_id: 330640[/import]