need to upload this logo to Facebook without colors being ruined

I have a corporate logo: <[login to view URL]> But Facebook keeps ruining the colors when I try to put it on my Facebook fan page: <[login to view URL]> I know Facebook converts logo images to JPEGs when you upload them, but I also tried starting with a JPEG: <[login to view URL]> but after I upload that file to Facebook, it gets ruined, even though it's still a JPEG: <[login to view URL]> I even tried with a GIF with completely solid colors: <[login to view URL]> but Facebook ruined that too: [[login to view URL] ][1]So, I need to know: how can I put up a version of this logo on Facebook without it being ruined? If you look at the Microsoft fan page logo: <[login to view URL]> it's a JPEG but has no ugly artifacts. You can either (1) just tell me HOW to do it (using either tools that are built into Windows 7, or software that is freely available elsewhere -- and in that case, please tell me where to get it), or (2) send me an image version of this logo that I can upload to Facebook without the colors being ruined. However, PLEASE TEST IT YOURSELF FIRST using a temporary Facebook fan page. Whatever image file you think can be uploaded successfully without the colors being ruined, please create a temporary fan page and upload the logo, and verify that the colors do not get ruined. Please do NOT test it by uploading it as one of your Facebook album photos -- that won't work, because the way that Facebook modifies and compresses your album photos is different from the way that Facebook modifies and compresses logos on fan pages.