The news on Heise Online just got an update:
heise online - CeBIT special - Polizeiaktion gegen mutmaßliche Produktpiraten [Update]
Basically, it says a meizu manager told the dpa (a german news agency) that the raid had nothing to do with the miniOne, but instead with another MP3 player (no product name given). She said there were "discussions" regarding licenses.
Later today, the booth was re-opened, and the miniOne was on display again (but not the MP3 player).
Tomorrow I will go to CeBIT myself, I hope they don't shut down the booth again
