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Bug in IE6, but fixed in IE7, And please use GIF over PNG in your Gadgets

June 20th, 2006 by kenlin@HK [MVP]

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Update news from Live.com Team, they found a new bug in IE6 when IE doing the Image Filtering.
Details here,

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We have recently released a workaround for a bug in IE6 where image filters for PNG can cause a hang on the Live.com site. This IE bug is already fixed in IE7, but we still needed to workaround it to make sure the site works properly for IE6.

To understand the problem, here is an explanation from the IE team (thanks Peter Gurevich!):

  • Each IE 6 window is a UI thread. 
  • The HTML page and any script you written for the page run in the UI thread.  Therefore filters in your page or in script will download on the UI thread
  • IE’s implementation of the AlphaImageLoader filter downloads images synchronously 
  • Synchronous loading of an image or successive images on the UI thread has the potential to hang the browser and adversely affect the user experience.

Our workaround is to stop applying transparent image filters to PNG. As a result, your transparent PNG will not look as great as it used to. I would encourage you to change to using transparent GIF moving forward.Sorry for the inconvenience – the SDK will be updated with this new info in our next release.

Thanks!
James Lau
Program Manager
Live.com Team

Posted in Bugs, Internet Explorer, Windows Vista | 3 Comments »


This entry was posted on Tuesday, June 20th, 2006 at 11:03 pm and is filed under Bugs, Internet Explorer, Windows Vista. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.


3 Responses

  1. El blog de amuchamu - Microsoft vuelve a recomendar el uso de GIF en vez de PNG Says:

    […] Ahora es cuando me tachan de friki, pero yo es que “lo flipo” (quería usar ese verbo) con Microsoft. Recomiendan usar GIF en vez de PNG porque la cagan programando Internet Explorer, y lo llaman BUG, cuando en realidad siempre han estado en contra del formato abierto PNG, estándard ISO internacional y recomendado por la W3C. Es de sobras conocido que MSIE no maneja bien las transparencias de PNG, no sé qué tiene de nuevo. Bug in IE6, but fixed in IE7, And please use GIF over PNG in your Gadgets […]

  2. El blog de //Amuchamu » Blog Archive » Microsoft recomienda el uso de GIF en vez de PNG Says:

    […] Ahora es cuando me tachan de friki, pero yo es que “lo flipo” (quería usar ese verbo) con Microsoft. Recomiendan usar GIF en vez de PNG porque la cagan programando Internet Explorer, y lo llaman BUG, cuando en realidad siempre han estado en contra del formato abierto PNG, estándard ISO internacional y recomendado por la W3C. Es de sobras conocido que MSIE no maneja bien las transparencias de PNG, no sé qué tiene de nuevo. Bug in IE6, but fixed in IE7, And please use GIF over PNG in your Gadgets […]

  3. Pablo Selín Says:

    jajaja, dicen que usemos gif y ellos mismos usan png en la cabecera de este blog, ¿no será mucho? /* Hey you are using a png header, and a png background, didn’t you notice, why then encourage the use of such closed and boring format as compuserve GIF?