Keyboard shortcuts not working after update

Hi,

Since I updated to the latest wordpress I can no longer use some keyboard shortcuts..

I cant use CTRL + 1-8 to make headings, it just switch the tab in browser. Before I updated all keyboard shortcuts worked fine.

I also tried in firefox, but not working there as well.. I Use Chrome, but the only thing I have changed is wordpress, all other things are same versions..

Please help me, its driving me nuts to use the mouse to make headings..