Oddly enough, I had a worst version of Matteo’s problem; From a fresh re-boot, I’d open After Effects CC 2014, start a new, empty comp and find a single frame of a project I had worked on days before.
https://images.creativecow.net/213590/screenshot2014-07-01at12.59.47pm.png
I went to Preferences/Media & Disk cache, and emptied the Disk Cache. Didn’t help.
What worked?
I had to go to my Disk Cache folder (the directory that AE point to, to store all of your cache) and do my own erasing; the clear disk cache function had cleared files out of the “Adobe” folder but it DID NOT clear files out of the file that ended in “.noindex.” So I cleared the multiple folder inside the no index folder(there were 45,000 files!) and now my ghost frame is gone in AE.
https://images.creativecow.net/213590/screenshot2014-07-01at1.18.47pm.png
My question: What the heck did I do? And why is this a problem in CC 2014? I’ve never had an issue with this before.