When VAX is enabled in VS2010 RC the tooltip for function or method signatures does not show the current parameter in bold. When I disable VAX and leave it to VS the current parameter in the tooltip is shown correctly in bold.
Do you mean that parameters are never shown in bold? Or do you mean that as you change the current parameter the bold item is not updated correctly?
Do you have the IDE option:
IDE tools menu -> Options -> Text Editor -> C/C++ -> Parameter information
turned on or off? There is a known bug that the bold parameter in the tooltip is not correctly updated as you move the caret if this IDE option is turned off:
I have and had Parameter information turned on but I am not sure if the first param was bold and it didn't update or if none was bold.
The param tooltip which I see in VS 2010 RC with 1814 does not come from VAX - it has no tomato icon in front. Instead I get suggestions from VAX for each param value and the parameter info tooltip itself seems to come from VS but the text is colored by VAX.