Version 2.0.0.10 fixed the following security issues:
MFSA 2007-39 Referer-spoofing via window.location race condition
MFSA 2007-38 Memory corruption vulnerabilities (rv:1.8.1.10)
MFSA 2007-37 jar: URI scheme XSS hazard
All three are rated “High Vulnerabilities” by Mozilla. Download page.