Hmm, well liteicon has not gained 100% compatibility for Yosemite yet so clearing the cache with it won't probably work. If none of this works I'd say either wait for a while or look up on the web for help because I don't know any work-arounds as of right now. Yosemite is still fresh and most people don't modify Yosemite as much yet.
I haven't modified Yosemite like I did with Mavericks so, I haven't tried out my previous work for Yosemite but Apple has reduced some modification on Yosemite as some websites stated.
But please keep something in mind, Yosemite is still getting updates as it is not yet finished so by applying custom sidebar icons, folders and so on, it could make your Mac look messy or even screw up future updates. If you want to modify Yosemite, you should wait until icon change applications and so on gets updated for Yosemite. Just a friendly warning.