How do I make GVim use the icon in my icon theme?

Solution 1:

It is a known issue. The workaround is mentioned in the gnome-look.org Faenza page:

• Some applications are configured to always use the same icon regardless of the selected theme: e.g. vim, emacs23, gcolor2, bluefish, hardinfo, defcon, gufw, pithos, goldendict, rssowl, picasa, netbeans, gazpacho.
• To display the Faenza icon, edit as root the /usr/share/applications/application_name.desktop file and locate the line beginning with 'Icon='. Replace the fullpath icon name by the one of the Faenza icon (usually, it's the name of the application itself) without the extension.
• Don't forget to make a backup before changing one of those files.
• In some cases, you need to reinitialize the item in Gnome menu editor to display the new icon.
• Vim desktop file is /usr/share/applications/gvim.desktop