I just started a new world atleast 30 mins ago and already have a crap ton of slimeballs... spawn rate increased for slimes? Btw SO i can show you. How do i put on screenshots?
I would bet that you're in a swamp biome, or you're playing Superflat. For screenshots, post images on a picture sharing site (imgur is great) and then press the picture button on a reply, and copy/past the URL.
Slime spawn rate increased?