Why does text on some pages appear blotched with colored boxes?
Pages come up normally, then after scrolling the text becomes 'garbled' and unreadable, as if the colors making up the letters aren't aligned properly. Sometimes small colored boxes appear in the text. Highlighting the text seems to revert it to readability. IE doesn't do this on my Win 7 computer.
Chosen solution
Try disabling hardware acceleration in Firefox by going to the Tools menu, selecting Options, then selecting the Advanced tab. There you will find a check-box under the Browsing area that deals with hardware acceleration. Uncheck that and restart your browser.
If that helps, you may want to try upgrading your graphics card driver to its latest version. We have seen problems with text rendering in Firefox due to the graphics card.
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Try disabling hardware acceleration in Firefox by going to the Tools menu, selecting Options, then selecting the Advanced tab. There you will find a check-box under the Browsing area that deals with hardware acceleration. Uncheck that and restart your browser.
If that helps, you may want to try upgrading your graphics card driver to its latest version. We have seen problems with text rendering in Firefox due to the graphics card.
Try to set the gfx.content.azure.enabled pref to false or if this didn't help disable Direct2D by setting the gfx.direct2d.disabled pref to true on the about:config page and leave hardware acceleration otherwise enabled.
You can also try to uninstall Windows update KB2670838 if you have this update.
Solved by unchecking hardware acceleration!