Somehow the editing toolbar vanished and isn't visible anymore. What should I do?
The editing toolbar is built through JavaScript. This means if there is an error in the JavaScript somewhere the script will be aborted and the toolbar won't be visible. To troubleshoot this follow the following steps:
Obviously make sure you have JavaScript enabled and are using a recent Browser
Try to force a reload
Sometimes the Browser has a broken script in its own cache
Use Shift-F5 or Ctrl-F5 or what ever your browser needs to force a reload
Do this in the edit mode (ignoring the warning about repetitive POST data sending)
If you upgraded from an earlier version of DokuWiki make sure to have an up-to-date dokuwiki.php file
always put your changes in the local.php file
Undefined config values are known to break the JavaScript, so this is important! (ie: make sure $conf['usedraft'] is defined)
Try disabling any installed third party plugins, their JavaScript might be broken
Try different Browsers
Disable the JavaScript/
CSS compacting option
Do the force reload thing again of course

If you still have problems, check the JavaScript Error console of FireFox and report errors in the
bug tracker
If you encounter problems caused by a 3rd party plugin please contact its author and ask her to fix it.