iPad 1 owners said they faced installation error during the upgrade, the report was filed and then responded by Saurik itself.
He then explained the Corona 1.0-6 had a "Depends" which caused installation failure on the first generation of iPad.
Therefore users are recommended to update to this Corona 1.0-7. Because the problem has been corrected!
Albeit this one is dedicated to iPad 1 in order to kicke out the installation failure during upgrade. But it doesn't kill a cat if iPhone 4 or other A4 devices to get this update for avoiding the possibly bugs that might exist, however not discovered yet.
As always launch Cydia and then search for Corona 1.0-7 package to update to this version.