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.