I've no idea why this happens, it's not something we have control over, as it's a VB.NET editor shortcut. it might be that the ''' trigger only triggers if the file contains spaces instead of tabs. Our generated code contains tabs instead of spaces for indenting, it might be that this is the cause. it also might be a setting on the vb.net project properties in vs.net, not sure.
Also, it might be a bug in the vb.net editor and perhaps it's fixed in vs.net 2008 sp1.