In the screenshot below you should be able to see that the font size used for Menu Pulldowns is smaller than that used for Menu Items.
When I increase the Menu Item font size using the method provided at Stack Exchange GIS the size of both menu items and pulldowns increase, but the pulldown font size remains noticeably smaller.
I'm using Windows 7 and ArcGIS 10.1 and have tried deleting C:\Users\Graeme\AppData\Roaming\ESRI to see if that would reset it without luck.
Does anyone know how to make the font used by Menu Pulldowns match the Menu Items' font?
UPDATE: The same problem seems to be affecting Context Menu font size compared to the selected item in the Catalog window (see below).