Phantom Keytip conflict in Microsoft Office 2010 Ribbon Custom UI

Question

I'm trying to create a custom ribbon in one of my Excel 2010 addins, and for some reason Office is overriding some of the keytips (keyboard accelerators). I know if Office sees a conflict it will usually override one or both of the keytips to "Y", "Y2", "Y3", etc.. but in this example I only have one button in my tab so there is no other control for it to conflict with.

Here is the XML:

<customUI xmlns="http://schemas.microsoft.com/office/2009/07/customui">
 <ribbon>
  <tabs>
   <tab id="tabid_1" label="SampleTab" keytip = "B">
    <group id="grpid_1" label="SampleGroup">
     <button id="btnid_1" label="SampleButton" keytip="Z" />
    </group>
   </tab>
  </tabs>
 </ribbon>
</customUI>

Instead of the SampleButton having a keytip of Z, it gets replaced with "Y2". I see this behavior regardless of the keytip of the Tab (which is currently "B"). I checked to make sure that there wasn't some other button with a keytip of "BZ" that might be conflicting, but didn't see any.

I also see that behavior if I try to make the keytip of the SampleButton be "Y", but I assume this is because all "Y*" keytips are reserved for conflicts.

Incidentally, I was also having this problem with a keytip of "C", but for some un-explained reason that was happening only when I didn't have a label for the <group>. As soon as I added a label to the <group>, "C" stopped being overridden with "Y2". Very strange behavior.

Anyone have any ideas what could be causing this? Thanks in advance!

Answer 1

I was having the same issue and I ended up just changing the keytip value from an uppercase "Z" to a lowercase "z" and it worked. No idea why. Hopefully it works for you.