Description of problem:

Meld no longer shows diffs between working copy and last committed copy in version control systems.

Version-Release number of selected component (if applicable):
Meld: 1.3.1-3.fc14

How reproducible:
Every time

Steps to Reproduce:
1. cd into a VC directory with changed
2. type 'meld .' to see the changed files
3. click on one of the changed files
  
Actual results:

** (meld:2741): WARNING **: AT-SPI: Accessibility bus not found - Using session bus.

Traceback (most recent call last):
  File "/usr/share/meld/task.py", line 130, in iteration
    ret = task()
  File "/usr/share/meld/vcview.py", line 358, in run_diff_iter
    self.show_patch(prefix, patch)
  File "/usr/share/meld/vcview.py", line 500, in show_patch
    if misc.write_pipe(patchcmd, patch) == 0:
  File "/usr/share/meld/misc.py", line 241, in write_pipe
    proc = subprocess.Popen(command, stdin=subprocess.PIPE)
  File "/usr/lib64/python2.7/subprocess.py", line 672, in __init__
    errread, errwrite)
  File "/usr/lib64/python2.7/subprocess.py", line 1201, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory


Expected results:

To see a diff