Thanks to a comment Niels Leenheer left in my blog entry talking about my Safari problems, I was able to fix the crashes I encountered.

In the installation directory of the Safari Beta (C:\Program Files\Safari), you have to go through all subdirectories and make copies of the localization folders. Copy folders called en.lproj to de.lproj, and folders called English.lproj to German.lproj. For other languages, you need to adapt the folder names, obviously.

That fixed the crashes for me. The font rendering problems still remain, though. However, now I am actually able to report bugs :-)

Niels also posted a description on how to enable the debug menu.

If despite these problems you're still happy that Safari is being ported to Windows, you might drop over to the Surfin' Safari blog and leave an encouraging comment.