When you add APPs to your Ipad with a computer that is NOT Authorised with your Ipad , the APPs that were on your Ipad wouldn't work any more and you have to delete them all and re-install them.
My Cydia has the same problem , when I click on it nothing happens, its like it was jail broken BAD.
SO I don't really think its because of the connection.
I think I have to restore may Ipad to IOS 5.1 and then jailbreak it AGAIN , the problem I have is that I have to save my SHSH BLOB files with the software "Tiny Umbrella"(which doesn't run correctly on my PC)
Any of you know how I can SAVE my SHSH files by using Ifun Box or any other software?