How do I know??

[mikmik]

It is getting tough to be sure if you are really on the site that you THINK you are, and not a con...

Security Watch Letter: Adware, Phishing Plague IE Users

Threat: Flaw in Internet Explorer
Affects: Confirmed on Internet Explorer 6.0 and Windows XP. Can allow phishing attacks, or allow malicious users to bypass IE security zone.

What it does: Reported by Secunia uses a specially-crafted URL, which due to a flaw in IE's URL handling, can cause a malicious web page to be given trusted domain or local Internet security zone privileges. The flaw may also cause IE to display a misleading URL in the address bar, despite recent patches that fixed similar problems found earlier.

I know! Get this, I love it. One glance, and you can see what site you are really on.

What is SpoofStick?
SpoofStick is a simple browser extension that helps users detect spoofed (fake) websites. A spoofed website is typically made to look like a well known, branded site (like ebay.com or citibank.com) with a slightly different or confusing URL. The attacker then tries to trick people into going to the spoofed site by sending out fake email messages or posting links in public places - hoping that some percentage of users won't notice the incorrect URL and give away important information. This practice is sometimes known as “phishing".

http://www.corestreet.com/spoofstick/
No impact on performance that I can tell, good for IE and Mozilla.