Yesterday, out of pure curiosity, I tried to find Palomar 4th whereabouts. Star hopping is pretty easy. I started with a nice round NGC3687, then I located the 13 mag star by which the globular should be. I didn't have much hopes to see it considering the conditions I had (LM 6.1 mag approx. and poor transparency) and I was right, no sign of the fuzzy at all. Tried different magnifications (from 150x to 428x), no difference.
But now I know where it is and next time the weather allows I'll do better, hopefully :-)
I'm ashamed to say, I haven't seen any of Palomars yet...