Zidoo player prev and next chapter controls do not behave as in other media playback software and devices. PREV chapter currently always goes to previous chapter and makes it difficult to restart from start of current chapter. Prev chapter, on the vast majority of disc and media players, does two different things depending on how far playback has proceeded. a. Single press of PREV goes to start of CURRENT chapter. b. Quick succession of 2nd PREV press or multiple PREV presses goes to PREVIOUS chapter NEXT chapter goes to next media file even when playback mode is SINGLE file. This is would be appropriate for multi file playback mode, but not single file.