Text files changes default launching software

[Nicklas W Bjurman]

As I enter a space into the text file. The text file changes content-type and hence changes default launching software as well. In this case to Grapviz dot.

[Nicklas W Bjurman (lordmetroid)]

Please describe the problem:
As I enter a space into the text file. The text file changes content-type for
an unknown unexplainable reason and hence changes default launching software as
well. In this case to Grapviz dot.

Steps to reproduce:
1. Enter into gedit, "Automatically add <p> </p> aruond paragraphs of text,
unless the paragraph"
2. Save
3. Add a space and save(it is now detected as a Graphviz dot file)

Actual results:
First when the file is saved it is detected as text
After adding a space to the end of the line it is however detected as Graphviz
dot

Expected results:
Keep being detected as a text file.

Does this happen every time?
Yes

Other information:
http://launchpadlibrarian.net/28490754/Screenshot-1.png
http://launchpadlibrarian.net/28490767/Screenshot-2.png

comment(http://bugzilla.gnome.org/show_bug.cgi?id=587322#c1) from previously malfiled bug:
This is not a problem in gedit but in the shared-mime-info. I found the
following magic rule for graphiz dot files:

<match value="graph " type="string" offset="0:256"/>

Which nicely matches "... paragraph ". Please file a bug against
shared-mime-info (http://freedesktop.org/wiki/Software/shared-mime-info)

[Nicklas W Bjurman (lordmetroid)]

Comment( http://bugzilla.gnome.org/show_bug.cgi?id=587322#c1 ) from gedit upstream:
This is not a problem in gedit but in the shared-mime-info. I found the
following magic rule for graphiz dot files:

<match value="graph " type="string" offset="0:256"/>

Which nicely matches "... paragraph ". Please file a bug against
shared-mime-info (http://freedesktop.org/wiki/Software/shared-mime-info)

[David Faure (faure)]

Fixed (changed the 0:256 into 0; people using comments in their .dot file can just call it ".dot" or ".gv" and won't need magic).

The fix will be in the next release after 0.60 (I guess it will be called 0.70)

[David Faure (faure)]

Marking as fixed.

[Fabio Marconi (fabiomarconi)]

Thank you for taking the time to report this bug and helping to make Ubuntu better.
Is this bug reproducible with the latest Lucid packages ?
Tanks in advance.