Safari on Apple iPhone before 2.0 and iPod touch before 2.0 allows remote attackers to spoof the address bar via Unicode ideographic spaces in the URL.
https://exchange.xforce.ibmcloud.com/vulnerabilities/43732
http://www.vupen.com/english/advisories/2009/1522
http://www.vupen.com/english/advisories/2008/2094/references
http://www.securityfocus.com/bid/30186
http://support.apple.com/kb/HT3613
http://secunia.com/advisories/35379
http://secunia.com/advisories/31074
http://lists.apple.com/archives/security-announce/2009/jun/msg00002.html
http://lists.apple.com/archives/security-announce/2008//Jul/msg00001.html