I think Aamer had the dropped catch when Watson was on 99, but otherwise I can't remember any others.
I remember having this conversation with someone on CW. Aamer had 6-8 catches dropped off his bowling, so he was very hard-done-by. Not sure how many drops Roach had, but I don't think it was anywhere near that many.
Edit: Remembered incorrectly; it was 10 drops off his bowling in his career. 2 in Australia.
1st Test
3.4
Mohammad Aamer to Paranavitana, FOUR, Dropped Oh boy that should have been taken, Aamer fires it inwards on a full length and induces a thick leading edge, I think it was Younis who fluffed the catch at third slip falling to his right, the ball rolls away to third man
7.2
Mohammad Aamer to Jayawardene, no run, Dropped Akmal's the culprit, Aamer bowls it in the corridor outside off and induces a nick, Akmal didn't have to move, he's dropped a sitter
2nd Test
64.2
Mohammad Aamer to Mathews, no run, dropped at second slip, a sitter put down by Khurram Manzoor, Mathews edges the ball as it leaves him with angle, a healthy edge which flies around chest high to Manzoor
3rd Test
6.1
Mohammad Aamer to Sangakkara, no run, dropped, Manzoor the culprit, short outside off, Sanga pushes at it away from his body trying to get it past point, Manzoor is perfectly placed at gully exactly for that shot, and spills it in front of his face, straightforward chance put down. How costly will that prove?
14.6
Mohammad Aamer to Sangakkara, FOUR, edged and dropped, bowling from wide of the crease, Sangakkara is caught walking forward to a short of a good length delivery just outside off, tries to play it straight, and inside the line, gets a thick outside edge just wide of Manzoor at gully who gets his fingers to it as he dives to his right, but can't hold on. A difficult chance, but could have been taken.
4th Test
54.1
Mohammad Aamer to Bond, no run, Dropped It's Farhat again, man he's having a nightmare of a match at slip, Bond opens the face of the bat and offers catching practice, Umar went for it from second slip and Farhat may have been distracted at first slip, it carried to Farhat and he failed to hang on
5th Test
54.3
Mohammad Aamer to McCullum, no run, dropped, the third one of the innings, Gul the culprit, he's perfectly positioned at point, short and wide and it's slashed straight to him and he drops a straightforward chance
6th Test
131.4
Mohammad Aamer to O'Brien, 1 run, dropped, another one, Umar Akmal can't repeat the Vettori beauty here, short outside off, it's guided just wide of him at gully but came much quicker and he couldn't react in time moving to his left
7th Test
7.5
Mohammad Aamer to Katich, no run, dropped, Umar Akmal's the man, short and wide and he went for the cut, the first aggressive shot from the left-hander, struck hard and the 19-year old reacted late at gully, and was in some pain after letting it slip
62.3
Mohammad Aamer to Watson, 1 run, dropped on 99, fuller delivery and Watson drives in the air to backward point and the fielder, Rauf drops it and Watson has his century, well played, raises his bat to the crowd. Everybody rises to clap.Maiden century for Watson.
8th Test
A MIRACLE NO DROPS!!!!
This is ****ing unbelievable I thought it would be about half this number. Must have been 25 odd drops by Pakistan in those 8 matches. Think of all the runs that would have saved him, wickets he lost and pressure Pakistan lost.