Version:           3.3.1-1.2 (using KDE KDE 3.3.1)
Installed from:    RedHat RPMs
OS:                Linux

When using the WebDAV kio slave from konqueror (i.e. webdav://server/files/) to access files results in an old or current file being downloaded (depending on method of opening file).  A demonstration:

1)
Open a file using kwrite through konqueror.  Konqueror shows the file name (in the title bar) as /var/tmp/kdecache-pkopacz/krun/29126.0.testfile
Changes are made and saved.  Upon closing kwrite, konqueror asks if the file should be uploaded to which I respond yes.  To make it easier, we'll call the first version of the file Version 1 and the one that just replaced it (the one with the changes that was uploaded) Version 2.

2)
Right-click on the file in Konqueror, specify Open With... and select kwrite.  The file is opened with kwrite using the filename /var/tmp/kdecache-pkopacz/krun/29142.0.testfile (not the same numbers as before).  This is VERSION 1 of the file, not the updated version (i.e. this is the bug).

3)
Right-click on the file in Konqueror, specify Open With... and select Quanta.  The file is opened with Quanta using the filename /var/tmp/kdecache-pkopacz/krun/29158.0.testfile (again, not the same numbers as before).  Again, this is VERSION 1 of the file, not the updated version (i.e. it's not just kwrite).

4)
Again...
Right-click on the file in Konqueror, specify Open With... and select kwrite.  The file is opened with kwrite using the filename /var/tmp/kdecache-pkopacz/krun/29173.0.testfile (not the same numbers as before).  This is VERSION 1 of the file, not the updated version (i.e. still wrong).

5)
But this works...
Left-click on the file in Konqueror.  In the dialog that pops up, click the Open With... button.  Select kwrite.  Kwrite opens file /var/tmp/kdecache-pkopacz/krun/29188.0.testfile.  This is now VERSION 2 (this is right).

6)
Now...
Right-click on the file in Konqueror, specify Open With... and select kwrite.  The file is opened with kwrite using the filename /var/tmp/kdecache-pkopacz/krun/29200.0.testfile.  This is now VERSION 2 of the file.

7)
Same for Quanta

My (obvious) guess is that the contents of the file are being cached, and one method of opening the file does not check whether the cache is fresh while the other one does.