Since the release of the new Safari 3.0 (beta) browser last month we have had some reports that it crashes when users attempt to use Web Mail, or crashes when performing certain tasks. This is with OSX 10.4.
Thus far we haven't been able to reproduce this in any of our internal testing, and we've had trouble-free testing with Safari 3.0. If you can provide more information to help us pin this down it would be appreciated.
Keep in mind, that browser is a beta release which you use at your own risk, and thus it is subject to problems. On the Apple support site there are many reports and discussions about Safari 3.0 crashing on lots of other web sites, so this is probably not something specific to EarthLink and probably not something we can fix. You may want to keep using the 2.x releases for a while longer until they work the kinks out.
UPDATE - see this comment from user Paul Lustgarten. He says that new updates from Apple should fix the crashing problem, and points out that the 3.0 version is not a beta on the Mac, only on the Windows version. When I went to the Apple web site from my Windows machine, it said beta, so it evidently detected I was browsing from Windows. My mistake.