From my own practice (as black  ) I know that such an approach to play the Yugoslav Attack with 0-0 goes nowhere. 
It just leads to white waiting for black to destroy him on the queenside while he has no counterplay on the kingside.
In the line you give I think 12. ... Qc7? is bad.
Instead I would prefer either 12. ... a6 or 12. ... Nc4 when after both there will soon follow b7-b5-b4 when black gets queenside pressure with the normal sicilian minority attack while white has to defend.

I've got a question about the Rabonovich attack. Or to be more precise the line to avoid it with: 6.Be2 Bg7 7.Be3 o-o 8.Nb3 Nc6 9.f4 a5!?.

The question is whether there is a good reason that both Play the Sicillian Dragon and WWTD2 opt for 9 .. a6 as an avoidance measure here instead ?

The thing is that 9 .. a6 seems to give white some leeway in the classical lines after 10 o-o/Bf3 ^ o-o. 

Whereas after 9 .. a5 10 a4 Be6!? 11 Nd4 Qb6! is seemingly at least a draw for black pretty much by force.   
And 11 o-o with 11 .. BxN 12 PxB e6 ^ d5 etc (this last I found in my database from a game Peter Wells played in iirc 2003) seems very comfortable for black. The white light squared bishop seems to be struggling to make the required impact.
(10 .. Nb4 11 o-o Be6/d7 etc is presumably OK for black but gives white a lot more leeway.).
 
White can try something different at move 10 I suppose like Bb5 but it doesn't seem convincing. Is there something big I'm missing here?
 
It's slightly hard to believe it could be this simple for black given this was the main line way back. It's also very effective as a shock weapon vs juniors as I've been discovering 

In addition I think that 7.o-o o-o 8.Nb3 Nc6 9.Kh1 is White's best try for an advantage. This useful move leaves the choice between Be3, Bg5 and f4 open yet.

In the f4 line qb6 should be played if black is satisfied with draw ie na4 qa5 nc3 qb6 clearly if you are happy with black splitting the point this works the qb4 thrust is incorrect here your analysis is pretty good qc7 has done well see chessbase. all in all bd7 is the way to play if you are trying to win. please note the high rated elo players do not choose this option for white because of the qb6 draw.eric

This site has recently come to my attention and I am very impressed with the forum and its facilities!

My question is to do with 9.Nb3.  ???

I have tried in the past 9..Be6 10. f4 Qc8 10.Kh1 where 10...Ng4 has been met by 11. Bg1. I have come unstuck in this type of game many a times.

I am aware of 10..Rc8 but I feel that 11.f5 must be fine for white.

Any ideas would be gratefully received.

im confused a bit i must admit i am not a major sicilian player and when i do employ it a few times a year i play a pelikan!?- a hush falls over the forum as every one looks in disbelief at this newb?- 

I was wondering after the classical line what in the hell is your new target as black. If the castle queen side i am happy and if they castle short than i am lost a bit any advice would be helpful for some one who is interested in the dragon.

After 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be2 Bg7 7.Be3 0–0 8.0–0 Nc6 9.f4 Qb6 10.Na4 what do you guys think of 10...Qb4!? 11.c3 Qa5 12.b4 Qc7 Now White's queenside has been weakened, probably it is worth the loss of a couple of tempi.
For the earlier line, after 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be2 Bg7 7.0–0 0–0 8.Be3 Nc6 9.Qd2 Ng4 10.Bxg4 Bxg4 11.Nxc6 bxc6 12.Bh6 Bxh6 13.Qxh6 Qb6 14.Rab1, why not try 14…e5 15.Kh1 Be6 16.f4 f5 as in Rod. Perez - Tregubov, Cappelle la Grande 2000.  I think Black has more chances here than 14…Be6.  What do you guys think? ???