おっとっと
Although the Zero Day Initiative team does not offer specifics until the vendor has a chance to patch it, the blog post did say this vulnerability, which also affects Firefox 2, requires user interaction and could result in an attacker executing arbitrary code.
Firefox 3 suffers its first vulnerability - CNET News
What we can confirm is that about five hours after the official release of Firefox 3.0 on June 17th, our Zero Day Initiative program received a critical vulnerability affecting Firefox 3.0 as well as prior versions of Firefox 2.0.x.
Mozilla Firefox 3.0 Vulnerability - TippingPoint DVLabs
2.0.0.14にも同様の脆弱性ってことかな?