When your Perforce client just won't work...

Symptoms:
- Did a sync to head revision and all my local files were deleted!
- Couldn't retrieve files or check them in
- Clientspec seemed buggered

Solution:
- Deleted clientspec and started again:

[from my machine NOT on server]
p4 client -d -f clientspec_name

- then:

p4 client -f clientspec_name

- Then reset specific clientspec options from P4Win.