The LunaSysMgr process in Palm Pre WebOS 1.1 and earlier, when not viewing web pages in landscape mode, allows remote attackers to cause a denial of service (crash) via a web page containing a long string following a refresh tag, which triggers a floating point exception.
http://www.securityfocus.com/archive/1/507126/100/0/threaded
http://securityreason.com/securityalert/8373
http://secunia.com/advisories/36936
http://kb.palm.com/wps/portal/kb/na/pre/p100eww/sprint/solutions/article/50607_en.html#12