If you are seeing red or pink boxes on a webpage, this is the result of enabling "Turn on debug element hiding filters mode" on the Advanced tab in ABP's Options.
So that you can see what's hidden on a webpage, the debug element hiding filters mode highlights in red any elements that are affected by element hiding filters. Here's an example:
To disable it, do the following:
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Click the Adblock Plus icon on your browser toolbar. If you don’t see it, be sure to pin it.
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Click the gear icon. The Options page opens.
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Click Advanced.
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Under Customizations, deselect Turn on debug element hiding filters mode.