I'm getting 1013 constantly as well.
Did everything as suggested in the tutorial, still no luck.
Even tried some different steps, like deleting Tiny Umbrella and installing it again, redownloading the ipws file......
Will now try my luck on a windows machine
Exact same problem on a Windows XP machine.
I also tried using my locally saved vs the blob Cydia provided (by cutting the locally saved one from the folder and download the Cydia one), still no luck, 1030 it is for me
So no luck with an iPad 2 3G 32GB and 4.3.5, on both Mac OS Lion and Windows XP.