This indicates an attack attempt against a remote Denial of Service vulnerability in the Safari web browser.
If legitimate users are enticed to access a specially crafted XML document with an excessively large number of nested "" elements, their Safari web browsers will crash.
Apple Safari 3.2.2 for Windows
Apple Safari 4 Beta
Apple Safari 3.2
Denial of Service: Remote attackers can crash vulnerable systems.
Currently we are not aware of any vendor supplied patch for this issue.