How do a begginer should submit a patch?

[Manuel Martín]

The expressed method is preferred. But if everything fails,
here's a backdoor:

1) Download the file you are going to path to, using
    cvs.wxwidgets.org or svn.wxwidgets.org and make sure it is
    the last version of that file for that tag (i.e. 284).
2) Make a copy of it in another directory (you will need it for
    diffing).
3) Do the changes, build again the library and test it works, if
    possible, in all platform you can.
4) Perhaps docs (latex format) should be modified too.
5) Use a diff util (like "diffutils") as explained in technotes.
    If you patch several files, diff them in an only file.
6) Mail the .diff file to sourceforge, where you _need_ to be
    registered.

HTH
Manolo