I have been able to change the background color after installing the updates by changing
Tool / Options / Environment / Text Editor / Highlight Current Line (Active
From MSDN Thread courtesy of Cathy Sullivan Visual Studio Program Manager
Go to Fonts and Colors in Tools > Options > Environment > Fonts and Colors. Make sure "Show Settings For" is set to "Text Editor" and find the "Highlight Current Line (Active)" item in the "Display Items" list. Match the foreground color to the background color for that item and you'll notice the lighter border around the Highlight Current Line "disappears."