Built-in PDF support suddenly stopped working

[badlydrawnboy]

I prefer to view PDFs in Safari. However, starting this morning, when I click on a PDF file it opens in Preview.

I checked Cocktail to make sure I hadn't accidentally disabled Safari's built-in support. I hadn't.

Any ideas? How can I re-enable it?

 

[badlydrawnboy]

More information:

- I tried turning off all Safari extensions. Didn't help.

- I uninstalled Glims. Didn't help.

- I trashed the Safari .plist file. Didn't help.

- I trashed the Adobe Acrobat preference files and deleted the Adobe internet plug-in. Didn't help.

- I logged in to my wife's account on the same computer, and built-in PDF support IS WORKING in her account.

So clearly it's something in my account that's causing the problem, but I have no idea what it is.

Any ideas?