Changing facebook tab icon

thanks in advance for your help. I have a custom facebook tab which is set up as an iFrame, it needs to have a custom icon but despite setting the icon in various places it refuses to show up correctly on my main page. Here is what it look likes now

I have changed it in the developer page by setting the box and the change icon option but it never shows up on my main page

Can anyone tell me wh开发者_开发技巧at i'm missing?

Thanks, all help appreciated

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Make sure the icon you are using is in correct resolution, if the resolution is high, then the icon will not display. This also happens on normal websites.

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Judging from your description, you have assigned the icon correctly. Looks like a Facebook bug or caching issue to me. Have you tried renaming your image file and re-assigning it?

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Remove app from the page and then add it again :)