text block transitions look horsey

Let me rephrase...When viewed in Lectora (or published to HTML and viewed in Firefox), the transitions look fine. When viewed in IE, the text has a jagged (almost fuzzy) black background to it before the transition fully completes. I am using the wipe left transition, but it does the same for others. Does anyone else see this? I'm not finding a single archived post about it, so maybe it's just me...

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