Vulnerabilities reported against seamonkey < 1.0.7: http://nvd.nist.gov/nvd.cfm?cvename=CVE-2006-6497 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2006-6498 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2006-6499 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2006-6500 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2006-6501 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2006-6502 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2006-6503 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2006-6504 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2006-6505 All FE4+ releases have < 1.0.7 at the moment. By the way, seamonkey's CVS and package repository availability needs fixing, the FC-5 branch in Extras CVS has been marked as dead with a comment that seamonkey will be imported as a FC-5 (Core) update, but there's no such Core update and the packages are in the Extras FC-5 repository.
Built seamonkey-1.0.7-0.6.fc6 for FC6 and seamonkey-1.0.7-1.fc7 for Rawhide. Regarding FC5 see also the comments in bug 219365.