Yes, those blocks I mined do not give me any rewards, even though I worked on them.

I use GUIMiner and I am using my graphics card.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127675
102 Mhash/s.

Yes, I am apart of slush's mining pool.

21027    2013-12-02 23:04:34    5:49:17    1993521951    187    0.00000000    272726    25.00902152
21033    2013-12-03 06:36:22    3:25:33    1193139980    178    0.00000000    272787    25.10531795
21041    2013-12-03 20:26:06    1:26:57    506502935            23     0.00000000    272903    25.20706354
21050    2013-12-04 20:56:58    5:54:12    2136256505    371    0.00000000    273077    25.24311506

Those listed above I did a lot of work on the blocks (for my pc), most I ran for about 80-90% completion of the block.
I had to stop mining to give my computer a break so it wouldn't horribly die on me, or decide to catch fire or what not, while I was asleep.

Now for this block, I ran it for about 3-5 minutes for the last few % of the block completion, and STILL managed to get partial BTC for it.

21044    2013-12-04 05:32:23    4:27:56    1581873847    4    0.00000222    272974    25.02400700


If someone could help me with this, it would be greatly appreciated.