I have actually seen quite alot of Cronje against spinners & I certainly wasnt convinced , he wasnt afraid to attack them & he used to drive Warne pretty well.
But his problem was the defensive side of things where basically he was very indecisive & tended to get only half forward & push at the ball , add to that the fact he was a very nervous starter & it becomes clear why Warne got him out so often , Warne just has that amazing ability to get into a batsmans head , Cronje & Culinan being the perfect examples.
As for occasions of dismissal I remember the 1999 WC semi , Warne bowled him a good leg break which dipped & turned a little & Cronje suffered his signature dismissal , pushing meekly at the ball off the half front foot , only to edge to slip.
I also remember him getting out to Warne in near identical fashion a couple of times in 1997/98.
For me Lara , Tendulkar , Lehmann , Andy Flower (still counts as he's a FC player) Laxman , Dravid & Sehwag are the best players of spin in the world ATM , Jayasuria , Atapattu , Kalu , Hayden , all get an honourable mention.
Hayden does score a hell of a lot of runs off spinners , but the thing people overlook is that he does always seem to give them a chance , plenty of shots in the air , relies mainly on cross batted shots & when he's in form thats great , but against a real top class spinner (Harbhajan dosent count :P) he is yet to be tested, still a great player of slow bowling but not IMO up there with Tendulkar & Laxman who are able to dominate without ever seeming to give the bowler a sniff.