Since I haven't seen this anywhere else yet, I figured I might as well get it up here:

New Questions in the 2nd Edition:

Problem Solving (44 new questions):
1, 2, 7, 13, 41, 61, 62, 64, 67, 68, 69, 70, 71, 72, 78, 80, 81, 83, 86, 102, 103, 108, 112, 117, 131, 135, 142, 145, 146, 147, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 160, 162, 173

Data Sufficiency (32 new questions):
1,6, 7, 9, 11, 13, 14, 16, 21, 22, 24, 31, 33, 40, 43, 48, 51, 54, 66, 70, 73, 79, 82, 85, 96, 102, 104, 107, 111, 116, 117, 122

Additionally, question 175 in the problem solving is pretty much the same question, although it phrased slightly differently.

For future reference:
Questions in the GMAT Quantitative Review 1st Edition, which are not in the 2nd Edition:

Problem Solving:
7, 41, 58, 59, 60, 61, 62, 65, 68, 69, 70, 71, 72, 73, 79, 81, 83, 86, 102, 103, 108, 112, 117, 131, 135, 142, 145, 146, 147, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 160, 162, 173

Data Sufficiency:
1, 6, 7, 9, 11, 13, 14, 16, 21, 22, 24, 31, 33, 43, 50, 53, 68, 76, 79, 92, 98, 100, 103, 111