On Leopard, when visiting https websites with Safari 523.x or the WebKit nightly build, Safari immediately crashes before rendering the page. This behavior has been observed on multiple Intel Macs running 10.5.2, and only affects https sites. The proxy is a Microsoft ISA 2005 proxy with plaintext authentication.
Created attachment 19446 [details] Crash log from Webkit nightly r30662
This crash is outside of WebKit, in the CFNetwork system framework. As such the bug needs to be tracked by Apple via Radar rather than in Bugzilla. Closing as INVALID as per our policies for dealing with non-WebKit bugs in Bugzilla. <rdar://problem/5719333>