A friend gave me a PDF document with Certificate encryption, he bought from a vendor. The PDF even does not allow copy text, so he wanted me to crack it. After effort, I removed the encryption. And I also developed a software to do this kind job without need Adobe Acrobat, but I am not sure if it is legal or not, so I can not release it until I know it is legal.

BTW, Digital Signature vs (Certificate) Encryption
A digital signature can guarantee the integrity of the message and the identity of its sender. Encryption can prevent someone from being able to read an intercepted message.

Update: just noticed that LiveCycle Workbench ES has the feature, Remove PDF Certificate Encryption

Returns an unsecured PDF document when given a PDF document encrypted with a certificate. After certificate encryption security is removed from a PDF document, it is no longer secure.

Reference,
Remove PDF Certificate Encryption

I do not know what’s wrong with my Google Chrome Frame, when I tried to sign in one of my Gmail account(another account does has this problem), I always got the alert as the following screen shot.

and when I click OK, I got sign out.

Alert https://mail.google.com
You have been signed out this account.
This may have happened automatically because another user signed in from the same browser. To continue using this accout, you will need to sign in again.
This is done to protect your account and to ensure the privacy of your information.

I am sure I have signed out another account and try this account again and again, but without any success.

I want to migrate my VSS(Visual Source Safe) to Subversion (SVN), after some search, I found two tools,

VssMigrate, A tool, written in C#, for importing a Visual SourceSafe database into Subversion (SVN) while maintaining the complete file history.

vss2svn is a Perl script (vss2svn.pl) and accompanying C program (ssphys.exe) to migrate revision history from a Microsoft Visual SourceSafe (VSS) database to a Subversion repository.

I have not test which one is better, but I am familiar with C#, I like try the first one.