Background color differences between Visual Studio & Reporting Services

I'm trying to deploy a report to Reporting Services, but I've found that there's a behaviour difference Visual Studio and Reporting Services with the Matrix control for the subtotals.

For the background color for the "textbox" on the cells, I've used the folowing expression:

=Iif(Fields!ID__vs_YAGO.Value < 1, "Red"

,Iif(Fields!ID__vs_YAGO.Value < 1.02, "Yellow"

,"GreenYellow"))

The individual cells alternate colors, based on the value in the cell. In Visual Studio, the Subtotal cells also alternate colors (which is correct). But when the report is deployed to Reporting Services, The Subtotal cells have a transparent background. (Incorrect).

If I set the same expression into the background setting for the Subtotal cells, the expression is evaluated once for the entire row and the entire row has the same color (different Subtotal lines will alternate). This is the same in both Visual Studio and Reporting Services.

I'm using SP2, 2005 (32 bit for Reporting Services). To ensure full compatibility, I've editted / deployed the report all on the same machine.

Does anyone know of this problem and how to resolve it?

Additional: In testing the various output formats, it seems to be a bug in the HTML rendering engine. PDF amd TIFF work fine. I believe Excel export uses either part of the HTML rendering engine or pieces of the same code base.

P.S. I'm detecting other reporting differences between Visual Studio and Reporting Services, such as how "null key records" (from Analysis Services) are handled in groups. Is there a compatibility list published somewhere?

I've been having the same issues. I have been pulling my hair out for weeks.

Things to add:

I noticed that when deployed to Reporting Services, if you export to a TIFF or PDF, you will get the intended result. However, displayed on the web, and when exported to excel, it gives the above problems.