Permissions on .po files

[Runa Bhattacharjee]

Hi,
The permissions for the .po files is set to read-only when they are 
modified in the server repo. It is not a big deal changing the 
permissions, but it does become a tad bit irritating after a while when 
you start working on a file and then have to go back to change the 
permissions. IIRC, this was not the case earlier. Is there any special 
reason why this feature has been put in place?
thanks in advance
Runa