Webpage beling blocked by Sonicwall in IE but not firefox

I have a user who is trying to get to a legit website for our company.  I've verified that she's a member of all the correct groups and SHOULD have access to this.  I can bring up the initial website but if I click on any of the links the sonicwall (for her computer) apparently thinks that it is in a category that she shouldn't have access to.  If I open up FF and go to the same address, click the same link there is no problem.  Loads the page fine.  I've also noticed in IE that when I get the block page, if I click the reload page icon it will also display the page like it should.  I tried to call Sonicwall Tech support, and after watching the lady spend 25 minutes trying to figure out how to install Firefox on the computer I don't have a lot of faith they are going to be able to help me.  Anyone have any ideas?
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adml_shakeAsked:
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Rahul PatilConnect With a Mentor Commented:
Hi,

1.What version of Internet explorer you are using?Upgrade to latest or IE8 may resolve the issue.

Also check if  the behavior persist if you start IE8 32-bit in No Add-ons mode?

   => Start | (All) Programs | Accessories | System Tools | Internet Explorer (No add-ons)

2. Does the behavior persist if you Reset IE Advanced settings & reboot?

Regards,
Rtantra
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Rahul PatilCommented:
Hi,

Can you please check if proxy settings for Firefox and Internet explorer are same?
It looks like you are using different proxy settongs in IE and FF.

Regards,
Rtantra
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adml_shakeAuthor Commented:
We don't use a proxy server.  All our internet traffic flows from the onsite router to or corporate Sonicwall where it's then filtered.
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