Opera Web Browser 7.0 - Remote IFRAME Denial of Service
source: https://www.securityfocus.com/bid/10081/info
A denial of service vulnerability has been reported to affect Opera Web Browser. The issue is reported to present itself when Opera attempts to render IFRAME HTML tags that contain an invalid source argument.
A remote attacker may exploit this vulnerability to cause Opera to crash.
<iframe src="?" height=0 width=0>