Why are images opened in Preview locked since 10.7.3 Update?

Boot from your recovery partition by holding down the key combination command-R at startup. Release the keys when you see a gray screen with a spinning dial.

When the recovery desktop appears, select Utilities ▹ Terminal from the menu bar.

In the Terminal window, enter “resetpassword” (without the quotes) and press return. A Reset Password window opens.

Select your boot volume if not already selected.

Select your username from the menu labeled Select the user account if not already selected.

Under Reset Home Directory Permissions and ACLs, click the Reset button.

Select  ▹ Restart from the menu bar.

Launch the Terminal application by entering the first few letters of its name into a Spotlight search. Drag or copy -- do not type -- the following line into the window, then press return:

chmod -R -N ~

If you get an error message about permissions, enter this:

sudo !!

You'll be prompted for your login password, which won't be displayed when you type it. You may get a one-time warning not to screw up.

Then repeat the steps in my last message.

Thanks Linc. After having repetead weird problems (like Preview displaying old stuff all the time), tried the Cmd-R reset password solution that didn't work.

But the

chmod -R -N ~

(as root) did work.

Would the problem be linked to a Leopard to Lion upgrade? ACLs being different in Lion?