Thanks for taking the time to reply - much appreciated!
I have f*rted about for about an hour, to no avail.
When I tried this:-
I had much the same error!
As I tend to backup quite a bit of the stuff that's on my micrSD card to my PC, I found a CWM backup that I must have made shortly after installing Revolver 4.0.0 Beta 1.3. I copied this back over to microSD card - restorted via CWM & BINGO!
I am now "cooking on gas" again!
Unbelievable - everything seems to be OK!
Trouble is - I have got no idea what caused the problem in the first place, so I don't know if it will happen again
I would suggest backing up the sd card on internal data, and then formatting the system and data and well everything, and start from a fresh install, and then move back what you need... As something was definitely corrupted.. and also take regular backups, just in case
Sent from my HTC One X using xda premium