"Index was outside the bounds of the array" when exporting to PDF

I have a problem that is identical to the problem here:

http://support.microsoft.com/kb/978636

My issue is that I am using SQL 2008 R2 (10.5.1600), which is a later version than stated in this document.

Summary

I have a list that contains a subreport which contains 2 tablix items that are spanning multiple pages. The report renders correctly online, but when attempting to view in print preview mode or exporting to a PDF, the error message: "Index was outside the bounds of the array." is displayed. This occurs on the server (running SQL 2008 R2, integrated with SharePoint) and on my local Data Tools. I have upgraded my local machine to SP2 to see if that fixes the problem; it does not. The problem manifests itself only when the subreport spans multiple pages.

Thanks!