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Identify Password Fields
Shows which fields are password fields with a different background
Here's a screenshot of this script in action:

Notice how the background of the password field is grayed out by a pattern.
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Thanks, Joe.
I updated the screenshot above with your link.
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Fix your image.... I got the link for you...

http://i33.tinypic.com/2uzb0o5.jpglogin to vote
working as advertised under GM 0.6.2! Thanks Julien