Javascript errors in IE

I recently started receiving Javascript errors using IE 8.0.7600.16385 with or without compatibility mode. I’m wondering if this is a known issue or perhaps it’s been fixed in an update. I didn’t see anything resembling this when I searched the forums. The error is:

Message: Invalid argument.
Line: 69
Char: 69
Code: 0
URI: …/dhtmlxGrid/codebase/dhtmlxgrid.js

I’ve replaced the full URI with just the path for the file. Looking at the file, this is the particular area it’s referring to:

this.obj.style.width=summ+“px”;

This error pops up upon loading the Grid (no interaction required). Any help would be greatly appreciated.

Be sure that you have defined width for all columns
Similar error can occur in IE if setInitWidths was not used, or it contains invalid count of parameters.