Epic proxy is now powered by Epic and it is encrypted all the time :-)! So you have awesome privacy protection with the proxy on.
That being said, we didn't provide the most thorough answer for the previous posts / issue. Your IP can still get leaked when using Epic -- this is through plugins. Plugins such as Flash and others will generally revert to OS-level network settings and ignore our proxy. We are working on a method to block this or force plugins to use our proxy, but this isn't easy.
If you absolutely have to hide your IP all the time, you must disable plugins or making them click to play -- this is done in the Epic Settings page.
We haven't made plugins click to play or disabled them, because in testing, users found both situations uncomfortable as many websites do use flash and thus didn't work or were difficult to make work (though clicking to play isn't that hard, it does get annoying!). We've designed Epic to be a daily-use browser and are working to provide a fast, normal browsing experience with the maximum privacy possible and Epic does a fantastic job at that we feel...but for more even more privacy, you should make plugins click-to-play or disabled.
Also, Epic's proxy IP addresses (of which there aren't many admittedly) may be on some proxy lists -- so through these lists some sites such as Hulu may be able to detect that you're on a proxy.