Created SSRS server reports that display a document map containing 100+ entries. When reports are viewed using Report Manager the document map scrollbar is sized (properly) to scroll all records in the listing.
These same reports when viewed using the ASP.NET ReportViewer control display a document map with an improperly sized scroll bar. Scrollbar is slightly smaller than the height of the report/ReportViewer control. Scrollbar is useless, and user must navigate the document map using up/down arrow keys.
Is this a known bug

Why 2 vert scrollbars displayed in Document Map?
Mike Suarez
I changed the Subject of this post because I realized the report viewer control had nothing specifically to do with my problem. My problem is that the designer displays document maps differently (better) than the Report Manager and web ReportViewer control.
When previewing long document maps that aren't wide enough to display data, a horizontal scrollbar is displayed in addition to one vertical scrollbar. If the same report is viewed outside of the development tool a second (useless) vertical scrollbar is displayed and hides the first scrollbar. The user needs to move the second vertical scrollbar to the right to display only one (useful) vertical scrollbar, or move the horizontal bar to the right to display the hidden (useful) vertical scrollbar. I guess this is an html limitation.
ericjs1