Third Mind | IE8 customization and browser compatibility
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IE8 customization and browser compatibility

When testing for browser compatibility, you may come across instances where a client has the same version of IE8, yet they are seeing a different response to the page rendering. Be aware that IE8 can be customized at a user level via administrative tools. This level of customization may interfere with standard browser compatibility testing.

Example of IE8 non-customized:

IE8 Uncustomized

Example of IE8 customized:

IE8 Customized

NOTE: You can tell this version has been customized because of the extra characters at the end of the release version.

For more details, view the technical bulletin: