Jython 2.5rc3 seems to behave differently to Python 2.5 and Jython 2.2.1
in the handling of absolute paths to files on Windows.

In particular jython2.5rc3 seems to need to a drive prefix added
unlike Jython2.2.1 and CPython2.5

The following show attempts to open and existing file
     /home/misc/jython/bug/t.txt

The tests were run under Windows XP and similar results are obtained
from the Windows cmd shell and cygwin/bash.


Jython 2.5rc3
=============
C:\lib\jython2.5rc3>jython.bat
Jython 2.5rc3 (Release_2_5rc3:6384:6385, May 26 2009, 15:51:41)
[Java HotSpot(TM) Client VM (Sun Microsystems Inc.)] on java1.6.0_04
Type "help", "copyright", "credits" or "license" for more information.
>>> file("/home/misc/jython/bug/t.txt", "r")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
IOError: [Errno 2] ENOENT: '/home/misc/jython/bug/t.txt'
>>>
>>> file("c:/home/misc/jython/bug/t.txt", "r")
<open file 'c:/home/misc/jython/bug/t.txt', mode 'r' at 0x1>
>>>


Jython 2.2.1
============
C:\lib\jython221>jython.bat
Jython 2.2.1 on java1.6.0_04
Type "copyright", "credits" or "license" for more information.
>>> file("/home/misc/jython/bug/t.txt", "r")
<open file '/home/misc/jython/bug/t.txt', mode 'r' 1>
>>>

>>>


Python 2.5.1
============
C:\lib\Python25>python
Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> file("/home/misc/jython/bug/t.txt", "r")
<open file '/home/misc/jython/bug/t.txt', mode 'r' at 0x004A0338>
>>>