I hope this is a UDK issue. If not, can someone please redirect it :-)

The move-word-backwards 
function is oddly broken in the Basic IDE. If you start at the end of a line, the first press of ctrl-
left arrow jumps the cursor right to the beginning of the line, like the home key. Subsequent key 
presses move one word backwards as they should. If you reach the end of a line by pressing ctrl-left 
from the beginning of the next line, the cursor moves correctly backwards by the word. Placing 
the cursor in the middle of a line and then pressing ctrl-left works properly, too. It's just when 
you start at the end of a line that this happens. But of course that is the place where the cursor 
spends most of it's time while editing.