your suggestion got me to thinking...
I found that if I add version to the arcclient.css entry in the start page, it will force the browser to load the latest version and I no longer have the column and table misalignment issue.
<link type="text/css" rel="stylesheet" href="/Longview/10/Analytics/client/css/arcclient.css?ver=220.127.116.115"/>
Is this an acceptable way to solve this problem, or do I risk causing other, unforeseen consequences?
I also have an open ticket with Insightsofware for the same question.