Of all that work, bleeding the fuel lines is probably the most likely, IMHO. Try again?
Do you mean the oil breather is dripping oil? That's not terribly uncommon if it's a very little. If a notable amount, you may have blockage or blow by in the cylinders. If she ran well very recently and before you began this work, I would doubt either. Can I assume you are certain you didn't overfill the oil?
Edit: did you flip a compression release lever intentionally to bleed or by accident?