[PD] file association on gnome

[patco]

Hi, something weird is happening if I want to open pd patches with
double clic, it opens the patch with gedit

any good gnome user would tell me to right clic on the patch icon and
select open with pd

and it works

but after I do this setting, .txt files are opened with pd!??

so I do right clic on txt file, open with gedit

and it works

but after I do this setting, .pd files are opened with gedit


and so on

do someone has the same behavior?

This is happening on ubuntu hardy i386 and pd-extended