Screwed again.
Adam all states vary on what deposits can be used for. There are two types of deposits, a security deposit and a damage deposit.
A security deposit is just that, it is rent security for a landlord. If you don't pay your rent they can deduct the rent owed from the security deposit. The security deposit cannot be used for repairs or damage (see damage deposit)
A damage deposit is just like it sounds, if you damage the property the landlord can deduct the charges to repair the damages to the property from this deposit.
Like I said some states may vary on this but if your deposit was a true security deposit and it states this in writing you have a good arguement that it cannot be use for repairs. The only thing he might be able to deduct from your security deposit is the late rent fees, if any.
Chuck