Firefox 2.0.0.12 IFrame overflow vulnerability PoC here: http://carl-hardwick.googlegroups.com/web/Firefox2.0.0.12IFrameDoS.htm?gda=4JPX1k0AAAArdYnIsP_RGVzLBfeWBaUmJHMhbJyqNDyI290QuyyeUGG1qiJ7UbTIup-M2XPURDQ_Vb1oK3VK3gLweoqlIdXNbMjh5chVoSCmWxyNoTvcEg