Hi,

suppose there was an online wallet service with a patched version of the official client:

The patch would:
- prevent the client to generate a new address every time it needs to put the money change somewhere
- instead, it would always put the change back to the source address

The benefit would be for the users to be able to check their total balance by simply checking their address on blockexplorer.

My question is, would this have any serious drawbacks, other than loss of anonimity?