That's how the situation was described by our forum member
Anathema(I corresponded with ICQ, and I did not receive permission to quote, however, like a rejection, but
if the author wishes, I can remove this message )
Anathema [savagemessiahzine.com] (20:42:06 3/06/2009)
Even when I was a beta tuna 8.2, even then it was impossible to make a jailbreak 3.0 beta. Then I began to put in a file with a file iTunesMobileDevice.dll QuickPwn 8.1 from tuna and everything worked. Whoever put 5 beta of 3.0 and made Jail, already know that part of the file managers stopped working, and some are beginning to see, not all folders. For now, just the Release, and someone spread the rumor. In fact, it's much easier - Apple changed the protocol a new tuna not to prohibit Jail, and in order to optimize and / or add new features, and it so happened that many of the old rpm being stopped working. This is normal and will be corrected with the release of new versions of these programs.
P.S. I set 8.2 and synchronized the phone (2.2.1, the jail was done on tuna 8.1). Everything works fine, even "all that is needed" is set as it was!
Save iTunesMobileDevice.dll from tuna 8.1 just in case. Then it can be enclosed, for example, in the unpacked QuickPwn for jail. This information has not yet been verified, if anyone wants to experiment, then write about the results.
If someone helped this way of gratitudeAnathema