Tip #1: Be Aware of PNG Limitations in Internet Explorer
The Portable Network Graphic (PNG) format is well supported by modern browsers (e.g. IE 6+, Firefox 1+ and Opera 5+), except for two issues with Internet Explorer:
Graphics tools like Adobe Photoshop save a Gamma correction table in the PNG file that is designed to allow for differences […]
If you’re tuning a web page’s performance there are two types of visitors that you need to be concerned about:
A new visitor to your site who won’t have any of your pages, scripts, CSS or images in their browser cache.
An existing user of your site who will have your cacheable pages, scripts, CSS or images in […]
Have you ever been to a web site and seen this?
This warning is triggered in IE if it is displaying a secure HTTPS page that has caused a non-secure (i.e. HTTP based) resource to be downloaded. The message box doesn’t allow the user to control whether the non-secure content should be downloaded, only whether it should be displayed.
This […]
The result column in HttpWatch may sometimes display the value (Aborted) instead of an HTTP status code:
(Aborted) is one of three pseudo status codes that are used in HttpWatch to display information about HTTP requests that did not receive a status code from the server:
(Aborted)
(Cache)
ERROR_*
The last two values are fairly straight forward. The (Cache) result is displayed when content […]
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