rocknbil - 3:41 pm on Apr 4, 2012 (gmt 0)
No suspicion intended, education. Many people do this and don't even realize what they are doing, or even consider it might be wrong. Hotlinking by definition is linking to a resource on an external server.
If your coppermine gallery is on the same domain, you can just use
... but if it's a dedi or VPS and it's actually a different domain (but same server,) yes you'll have to use the full URL.