Security experts and users were quick to find numerous bugs in Safari shortly after Apple released this beta browser for Windows.
It is said to have remote code execution bugs and denial of service bugs. A "zero day" exploit was also found.
Some security experts are expecting to see some of the vulnerabilities targeted because in the past Apple has had a negative attitude towards security researchers, according to some security researchers.
Some believe Apple rushed this browser out too quickly but will have fixes for the security problems fairly quickly. But, remember it is beta.
Most agree that Safari is fast, but it is also a memory hog.
Here are a few articles with more details:
Technology News: Security: Security Testers Spot Bugs Galore on Windows Safari
Safari for Windows Beta Hammered for Being Beta || The Mac Observer
More Safari bugs found after Windows release - News - SC Magazine Australia
PC Pro: Product Reviews: Apple Safari 3 beta