problem with tab-completion of file names

I am running R 2.1.0a under Mac OS X 10.3.9.

First, thanks for the beautiful job on this release. Every release is 
easier to use and has more functionality.

In R 2.0.1, I discovered that I could use tab-completion in the editor 
(i.e., pressing the tab key expands incomplete directory and file names 
just as it does in the tcsh and bash shells). This greatly speeds using 
the setwd() command, for example.

However, in R 2.1.0a, tab-completion fills in the rest of the directory 
or file name, but the filled part is selected, and typing replaces the 
filled part, negating the usefulness of this feature.

For example, if I do this:

 > setwd( "/Users/chal<tab>

tab-completion fills in the rest of the directory name, giving

 > setwd( "/Users/challing

But the "ling" remains selected, so if I attempt to start the next 
directory by typing "/", I get

 > setwd( "/Users/chal/

instead of the desired

 > setwd( "/Users/challing/


version information:
         _                       
platform powerpc-apple-darwin7.9.0
arch     powerpc                 
os       darwin7.9.0             
system   powerpc, darwin7.9.0    
status   Patched                 
major    2                       
minor    1.0                     
year     2005                    
month    05                      
day      12                      
language R

Conrad Halling
conrad.halling@bifx.org