This is a bit of a gray area right now and there aren't enough example to show exactly how they are supposed to handle it when, let's say, your chequing account gets overdrawn by X amount that when subtracted from your maintenance funds Y means you haven't maintained the proper amount of money.
If the overdraft of the account does not exceed the maintenance funds you should be perfectly fine, if it does, then this is the gray area we aren't entirely sure about. Credit cards and other debt (like a mortgage) should not effect your application.