I am having an issue with Safari where the wysiwyg doesn't finishing loading. I am testing on Safari 2.0.4(419.3). This page on  the main site doesn't finish loading either:  http://www.cutesoft.net/asp/EnableAll.asp.
If you have large amounts of content to load then it doesn't fully display it. I am not completely sure if the javascript causes the issue although I can't think of anything else that would be affecting it. Maybe some issue in the loader.js? I can't test this fully because I don't have any debugging tools for safari. Any ideas?