2004 Subaru Forester XT Problem

I had my oil changed on 11/1/10 at a drive-thru Valvoline place and provided an OEM oil filter. I've done this for several years without problem. About 2 months later I started noticing a burnt rubber smell so I had the oil checked and it was no oil in it. I was surprised that there were no oil spots on my garage floor, but a friend told me I might not see it because of the front skid plate. So I put some oil in it and took it back to the Valvoline place and they discovered that the filter had not been securely tightened so they changed the filter and replaced the oil. They refunded the cost of the last oil change and had me report what happened to their corporate office in case any other problems arose that could be related to driving it without any oil in it. Since then, I've heard a whining noise that gets higher pitched as I accelerate until I can't hear it anymore and the burnt rubber smell is really bad inside the car like something is overheating but the temperature gauge doesn't reflect any increase. Could this be related to the faulty oil change by Valvoline? If not, what do I need to have checked out and can you provide a cost estimate? Thanks for your help. Pamela N, Knoxville, TN