Has anyone gotten a regex plugin to work in gedit 3 (Fedora 15)? I have tried 2 plugins so far: http://halfhourhacks.blogspot.com/2008/03/gedit-regular-expression-plugin.html http://code.google.com/p/yare-gedit-plugin/
For both, I tried installing to ~/.local/share/gedit/plugins/. According to https://live.gnome.org/Gedit/Plugins, this should be the correct location. For completeness, I have also tried installing to ~/.gnome2/gedit/plugins/, the location that worked for me in Ubuntu 10.10. Neither location produced any new search menu entries or any listings in Edit -> Preferences -> Plugins.
advanced-find 3.0.0 beta supports gedit 3, you can have a try. (I'm still using gedit 2)