Since the latest update of iTunes v9.1, some users are experiencing issues with the use of Blackra1n, which can be annoying to jailbreak your iDevice or re-activate your Springboard in the case of an tethered jailbreak.
iH8sn0w had released Blackbreeze, but some users have still this issue.

Here is BR Fixer by Kirma, a modification of Blackra1n to be compatible with iTunes 9.1

• BR.Fixer.By.Kirma.v1.2
• Unzip this file into a folder.
• Start the .exe file.

V1.2 : Automatic detection of your OS system.