I just installed Adobe Reader on my new computer, only to discover that it hijacked the PDF preview window in TextMate when working on LaTeX documents. This also happened the last time I installed a new system, and I couldn’t remember what I did to change it back to using Preview as the default PDF viewer.
After googling around, I remembered that TextMate is just using the regular browser settings when it comes to displaying PDF files. For some weird reason, you have to go in the Adobe Reader preferences to change this back. Unfortunately, on my system the uncheck box for this functionality is grayed out:
Finally, I just decided to delete Adobe’s PDF viewer plugin altogether, by deleting this file:
This solved the problem, both in Textmate and in my browsers. If anyone wonders, Preview is much, much faster than Adobe Reader and I also think it displays the fonts nicer.