Mine snapped.. when just about to pull away luckily.
I got it towed to my mates garage, I took the peddle off, my mate welded the snapped "lid" back on the box (welded all the way round), sprayed it black, refitted the white (unbroken) clip, then cursed and swore at the return spring, alll done and fixed in less than 2 hours.
I know we did a pretty good job on it (better standard than I would expect in an average garage).
However, I am not really happy with the clutch pedal... sits at an odd height and I sometimes have to flick it up (but then you get into the habit of checking every gear change)... this seams to be worse when the car has been sat for a while (I only use it at weekends).
Now I do currently have a broken clutch pedal switch (threads are stripped) and it was better when I readjusted this, I have got a brand new switch to fit so I'm hoping this might sort it... think I might get it bled too.
I'll let you know if it sorts it... I'm pretty sure it's the switch in my case.