Taskbar is buggy yes, but it is often a matter or setup. Try some different themes that uses it and see if you can find one where the taskbar works. Then copy & paste the settings from that theme and edit to suit your needs. Remember not to remove any lines even if your value is the same as default for that setting. Eg, if you don't want the taskbar ontop, write:

TaskbarAlwaysOnTop False

etc. even if removing the line would have the same effect. I don't know why this has any effect but I've found that this works for me for some reason. The mouse button actions are especialy sensitive about this if I remember correctly.