User-Agent:       Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.8.1.22) Gecko/20090710 Fedora/1.1.17-1.fc11 SeaMonkey/1.1.17

After installing gtk-rezlooks-engine package gnome-appearance-properties (and probably other gtk applications) produces an error message: 
/usr/share/themes/Rezlooks-Gilouche/gtk-2.0/gtkrc:186: error: invalid string constant "panel", expected valid string constant


Reproducible: Always

Steps to Reproduce:
1. Install gtk-rezlooks-engine from "fedora" repo
2. Start gnome-appearance-properties from terminal emulator or anyhow else

Actual Results:  
The error message specified appears in terminal emulator window or in ~/.xsession-errors file

Expected Results:  
No error messages

Such a bug is also reported for ArchLinux (http://aur.archlinux.org/packages.php?ID=9279). A solution provided there is to add:

style "panel"
{
}

into /usr/share/themes/Rezlooks-Gilouche/gtk-2.0/gtkrc. This works for me, i. e. after adding those lines at the beginning of gtkrc the error seems disappeared