opera: multiple vulnerabilities

From the SUSE advisory:

CVE-2007-6520: Fixed an issue where plug-ins could be used to allow cross domain scripting, as reported by David Bloom. Details will be disclosed at a later date.

CVE-2007-6521: Fixed an issue with TLS certificates that could be used to execute arbitrary code, as reported by Alexander Klink (Cynops GmbH). Details will be disclosed at a later date.

CVE-2007-6522: Rich text editing can no longer be used to allow cross domain scripting, as reported by David Bloom. See our advisory.

CVE-2007-6523: Fixed a problem where malformed BMP files could cause Opera to temporarily freeze.

CVE-2007-6524: Prevented bitmaps from revealing random data from memory, as reported by Gynvael Coldwind. Details will be disclosed at a later date.