slickgrid: extra column right side IE only - internet-explorer-8

Problem: In Internet Explorer 7 & 8 there is an extra column appearing on the far right side of the slickgrid.
I have taken the most basic slickgrid example and placed it into my application. All of the scripts, css, etc. are there and working properly. In Chrome and Firefox the grid renders perfectly, even with forceFitColumns: true.
I searched SO and found some similar questions but ultimately I believe this is different.
Any ideas of how to remedy this? Our users are unfortunately stuck with IE8 for now.

Answered my own question. There was an extra comma at the end of the script code where the columns are being assigned/generated. Facepalm.
I was planning to delete this question but another developer that I know happened to make the same mistake; so hopefully this helps someone else in the future.

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SmartGWT ListGrid is slow, but only in Internet Explorer

We have migrated from gwtext to SmartGWT and overall the experience is Ok. However, we have big problems with the ListGrid component of SmartGWT.
It is very slow if both of the following conditions are met:
Internet Explorer is used
5 or more columns
the speed will decrease if you add more columns up to the point where the whole thing is unusable and you have to kill the browser, e.g. through the windows task manager.
Grids with 1 column are fine in internet explorer
Grids with a large number of columns are fine in Firefox, opera
In the SmartGWT forums I've found two entries that are about this problem, but none of the suggested workarounds has fixed the problem.
http://forums.smartclient.com/showthread.php?t=5896
Since I am only allowed to post one hyperlink, here's the number of the second thread:
t=5193
Any help is greatly appreciated
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http://www.smartclient.com/smartgwt/showcase/#featured_grid_live
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From my experience I.E. 8 handles horribly more than one or two buttons in a page (input type=button or button tags). I don't know if listgrid makes any use of that but if it does there is no workaround. Use something that uses divs.
Try using grid's setFastCellUpdates(true);

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