Recently the RedSn0w 0.9.8b1 for iOS 5 released, many friends have begun to jailbreak their idevices, this is jailbreak method (Jailbreak iOS 5 with RedSn0w 0.9.8b1), but someone encountered an error with redsn0w_win_0 .9.8 b1 jailbreak iOS 5.
When you select the iOS firmware, an error: Unexpected error during preparation.
How to fix the problem? Solution: change the firmware name iPhone3% 2C1_5.0_9A5220p_Restore.ipsw to iPhone3, 1_5.0_9A5220p_Restore.ipsw can be resolved, Then you can be the next jailbreak step.
Solemnly Tip: redsn0w_win_0.9.8b1 for the tethered jailbreak