Avant Browser 2011 Build 28

* [Fix]Downloading files failed
* [Fix]Rendering problem in gmail
* [Fix]Logging out problem
* [Fix]Downloader didn't save customized settings
* [Fix]Switching Avant Browser to the Full Screen mode in the second monitor caused the windows task bar to disappear
* [Fix]Switching from the Full Screen to the Full Desktop mode caused the windows task bar to disappear
* [Fix]Tabs kept showing progress bar though the option "Show Progress Bar on Tabs" was disabled
* [Fix]In some cases using "Save Selected Region as Image" caused the page to become blank
* [Fix]Switching between tabs caused the icons in the desktop to refresh
* [Fix]In some cases the Address Bar Drop Down List didn't disappear
* [Fix]Some minor problems