Graphics messed up after JS animation

Hello everyone,
I'm working on my first website.  I finished the design enough to upload it and get it hosted but there are still several things I need to fix.  

Here's a Link to my site

When you click the navigation buttons on the bottom of the page one element slides out and one slides in.  This is working fine but my Logo in the upper left gets messed up sometimes.  It has vertical bars across it and looks like this.
Vertical bars over logo
I don't think I'm using the best technique to get my elements to slide in and out.  It works but obviously not very well.

You should be able to see the contents of my JSMain.js file using you're browser element inspector but if not let me know and I'll post it here.

Thanks for the help in advance,
Kyle

P.S.  Yes, I know the Contact page is messed up.  That's my next question :-).
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kgerbChief EngineerAsked:
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Tom BeckCommented:
Not seeing it on my system. I tried Firefox, Chrome and Safari. Could it be limited to a certain browser or OS? Nothing in Javascript is likely to cause bars to appear over an image.
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kgerbChief EngineerAuthor Commented:
@Tom
hmmm...I just tried it in IE and Chrome and you're right, it's working fine in both of those browsers.  But in Firefox it still gets messed up.  I tried clearing the browser cache and it still happens.  I'm running Windows 7 64 bit.  Are you using Windows or OS X?
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Tom BeckCommented:
OS X, Firefox v38.05.

This from a Firefox forum, but it says the bars show up in Chrome. Do you have a Nvidia graphics card?

This one says Firefox but again points to the graphics card.
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kgerbChief EngineerAuthor Commented:
Yes, I have an NVIDIA Quadro 2000M.  I scanned through the bug tickets you posted and they suggested it might be a problem with hardware acceleration.  I turned it off and I could not reproduce the problem.  I turned it back on and the vertical bars returned.  Seems like that's it.  I guess depending on how much I care I'll take it up with Mozilla.  Thanks for the help!

Kyle
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Tom BeckCommented:
You're welcome. Glad to help. Thanks for the points.
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