I lost selection and navigation tools from the GGIS 1.8 toolbar when I tried drag then to different place. I can't get them back anymore. Where they disappear? All these tools are checked but are still missing.
Toolbars are located outside your screen area.
You can use Python console to move them on screen.
Here is example of moving Navigation Toolbar:
Names of other toolbars can be found by this link.
uninstall, clean registry with ccleaner.remove .qgis folder ( note the dot) reinstall.