Since updating to Yosemite we got big problems pasting in formated Text out of any MacOS related program into Photoshop.
It tells us that there is a empty cache or some critial error. (Photoshop error message)
Please take a look on this.
Sorry for the late response to this message -- it got lost in the holiday shuffle.
Are you still having this problem with Photoshop on mac OS 10.9? What version of Photoshop are you running? Have you tried updating to the latest release (not that this is a bug I've ever heard of, but *shrug*)?
Given the screenshots, you're working in German, nicht wahr? Es gibt wirklich fast keinen Untershied zwischen den Deutsch und Englisch-Versionen. Ich habe solches Problem nicht gesehen...
Please ping me back if this problem is still an issue.