Creating a new file blocks Textmate

When I want to create a new file through the button (left-bottom one) in the project drawer or in the file menu it takes a long time and blocks TextMate and even blocks TextMate totally in some cases.

I've installed the latest version of TextMate and installed all updates available for Mac OS X.

Anyone any idea what the problem is?

I just tested it with a couple of different massive projects on my MBP and it created a new file right away.

First guess would be perhaps a bundle or other plugin you've added is interfering with the program operation somehow. You could also try trashing your Textmate preferences file and restart the program to see if that helps (~/Library/Preferences/com.macromates.textmate.plist).