Vocals sound slightly high pitched?


This happens with all the records I've played so far. My turntable's set to the right speed (I know because when I flick the speed switchn to the other setting, it sounds chip-munky and twice as fast). At the moment, the vocals are slightly high pitched (noticeably but not unbearably). Is this just something that'll go away as my cartridge breaks in or is there something wrong with my setup? Thanks.
toxicwaterfront
Also, I should probably mention that I test-played a song that I was very familiar with. I pressed play on the turntable (as some of you may know, there's a slight delay of a few seconds) and as soon as the song started, I pressed play on my laptop. The maximum difference was less than a second. I had one earphone in my ear and the other listening to the turntable version. All parts of the song (guitar intro, vocals, a spoken word sample at the beginning, etc.) had a noticeably but not unbearably (by this I mean, it wasn't chipmunk-level but I could clearly tell the difference) higher pitch than the MP3 version. The song itself also played slightly faster than the MP3 version.

Also, I didn't exactly note the times, but the turntable version of the song was running quite a bit faster than the normal version. Halfway through the song (at around the 1:30 mark), the computer version was running 10-20 seconds behind (again, just an approximation as I didn't note the exact spot on playback).
Toxicwaterfront, a strobe disc has different markings for 50hz and 60hz. that work off of the household current. Use any good light plugged into your outlets to adjust your speed. 60hz in the USA. A flashlight will not work. Get a strobe disc, easily found online.
Get....a....strobe....device.
You will find that your turntable is off-speed, on the high side. There is no mystery here.
I don't know about your TT. Does the platter have strobe markings? If not you will need a test disc with the 33 and 45RPM markings. Add to that one flourescent light (portable or battery operated one) and you be able to get the job done.
Suppose I do get a strobe light, check the speed, and it's running fast...what do I do then?