Using Classic Theme Restorer AND Colourful Tabs has a side effect on one of my systems.
On Win7, there is no problem with that setup.
On Linux (at least under KDE 3.5), the Tab-Stack appears on top of the symbol bars, under the menu bar. (I have KDE 4 running on another computer, but haven't dared to switch to FF29 on that machine yet.) See the attached screenshots for a comparison between Theme Restorer ON and OFF.
When I switch off the theme restorer, it is correct, but I would like to have some of the usual back/forward/stop etc. icons, so I prefer using it.
Do you see a solution?