Thankfully not on the Lotus, but on the Focus.
We have felt a lot of wheel wobble this week, getting gradually worse. I've just checked the nuts and on of the is slightly deformed (ie fatter) and comes loose by hand. I've tightened it to the right torque but it just pops loose again simply by touching it. I had to use a 20mm socket instead of 19mm for the rest of the nuts.
What might have caused this? Over-tightened? Wrong nut?
The wheels haven't been off for sometime and i first felt it whilst commuting back from Southampton on the motorway!
Looks like the Elise will be getting more use this week!