MICHELE BALISTRERI  Snapplr is currently in beta and as such can be used for free (I think Skitch has the same terms ATM).

Other than that, Snapplr is quite different from Skitch in the way it is operated.  
(Version 1.0b1)

MICHELE BALISTRERI  Could you write us at support@briksoftware.com ? I've tried with version 3.7.3 to unlock the file you specified and it works perfectly. I think I know whats wrong on your system, if you mail us, we can sort this out.  
(Version 3.7.3)

MICHELE BALISTRERI  The user sent us broken source documents. I tried my best to fix his source documents but without success. Is to be noted that PDFKey Pro worked perfectly on them, but it obviously couldn't fix the fact that the document was messed up to start with. We do not offer refunds because the trial version is enough to test the application before purchasing it.  
(Version 3.7.2)

MICHELE BALISTRERI  Preview.app behaved a bit like the standard PDFKey version, the files are not complete of bookmarks and their layout is adjusted for printing. However it should not work at least on 10.3 systems because the enforcement of the protection is not to be integrated in the applications but is integrated at system level (that is, it should print blank pages). PDFKey print protected PDF files and PDFKey Pro can instead give you a file identical to the original, including forms, bookmarks, etc, except that is decrypted.  
(Version 1.2)

MICHELE BALISTRERI  I really like the way you can customize the behaviors of your system using their haxies, i really do not know about those instability problems which i haven't experienced, maybe i'm just lucky.   
(Version 1.4.6)

MICHELE BALISTRERI  You can email me describing exactly your problem, i will try to fix it as soon as i can.  
(Version 1.0.6)

MICHELE BALISTRERI  May you want to send me a bug report? You can see that i mantain regularly my program releasing often fixes (maybe too often) and i'm willing to fix every bug that can bother the user. Please get in touch with me if you want to.  
(Version 1.0.3)

MICHELE BALISTRERI  Crashes and does not work? You might probably want to contact me before giving bad, unhelpful comment on a popular mac site. This program is just version 1.0 and i had the chance to test it only with about 30 files. I'm sorry if it didn't do the work for you.  
(Version 1.0)