Unhide KeyboardShortcut DOES NOT WORK!

I have blender 2.66a and for somereason alt+H does NOT unhide! I don’t know if its just the lastest build or what. I can unhide things in one of the sidebars, but only in object mode. I NEED to be able to hide vertices and be able to unhide them… but for some reason I CAN’T. If anyeone else has this prolbem or knows what may be wrong, please, PLEASE help me.

-DigiFix

I can unhide things in one of the sidebars
What sidebars ? unhide what ?

I NEED to be able to hide vertices and be able to unhide them… but for some reason I CAN’T.

Blender version - official 2.66a or some experimental build ? If experimental does it work with official 2.66a
Are you using default blender shortcuts and preferences ?
Is your mouse curser in the 3d view when you unhide ?

Attach / post a link to an example blend file.