WebKit-r36012 wont start instead Windows report the error message: Safari cannot open a browser window and may be missing important resources. Try installing Safari again. After several reinstall attempts (of: Safari 3.1.2, and even the Safari 4 dev.2 upd.) and various tries of recent Webkit versions the same error message appear and the only way to run safari is by its default mode, safari.exe file not the nightly-webkit.cmd.
I believe Steve fixed this yesterday. Can you grab the latest nightly and try it again?
Unfortunately the WebKit-r36254 does not work with either my Safari 3.1.2, nor my Safari 4 dev preview 2. I had to revert to an earlier version. However I noticed the process of copying the files in the temporary directory seemed somewhat different.