IDM_PREVFILE, IDM_NEXTFILE broken in GTK CVS?

Recently, though I'm not sure exactly when, navigating between tabs using Ctrl+PageUp/PageDown (which use IDM_PREVFILE and IDM_NEXTFILE) stopped working in my build of the GTK SciTE CVS code.

I have this in my user options file:

user.shortcuts=\
Ctrl+PageUp|IDM_PREVFILE|\
Ctrl+PageDown|IDM_NEXTFILE|

I've tried mapping other keys to IDM_PREVFILE and IDM_NEXTFILE but to no avail. My checkout has some differences in gtk/SciTEGTK.cxx to alter the menu items and accelerator keys, but is otherwise identical to CVS. I also recently update to Ubuntu Feisty Fawn (from Edgy Eft) which may be related, but I figured I'd try here first.

Does anyone have any ideas about what's wrong?

Also, I just noticed that a single column block selection starting at the beginning of a line shows no selection highlighting.

-Geoff