The Black Hole Prism image is based on the experimental development branch of the Prismcube image and for this reason, any bugs that you find in the official or development images, may also be present in the Black Hole Prism image.
Whats New:

Black Hole Team:

[NEW] Support skin Aeon Nox in Black Hole panels
[NEW] Add default city in Bh Meteo
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Marusys:

[FIXED] Bugs on EPG loading.
[MODIFIED] Russian OSD translation update
[MODIFIED] Pre-installed XBMC addons update
[MODIFIED] Recommend a mount path when you entered inaccessible path
[MODIFIED] Polish OSD translation update
[MODIFIED] Label format in XML
[MODIFIED] German, Russian and Polish OSD translation update
[MODIFIED] EPG window speed optimisation
[FIXED] Some minor bugs on recording on NAS
[FIXED] YouTube and HbbTV menu operation in Advanced options
[FIXED] Update the file list in Archive when USB is connected/disconnected
[FIXED] Some minor issues on NAS recording
[FIXED] Channel list bug in Show more EPG mode
[FIXED] Minor bugs in channel list and live plate
[FIXED] Update write permission in NAS server after refreshing record path
[NEW] NAS mode on slide menu in Archive ( shown only when NAS is connected )
[NEW] YouTube TV support
[NEW] Cross EPG support ( rytec, opentv, etc )
[NEW] Aeon Nox skin support
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Known Issues:

[UNRESOLVED] PIP stability in fast scan fav group and scrambled channels
[UNRESOLVED] Having trouble to connect to hidden wifi network
[UNRESOLVED] Blind scan missing
[UNRESOLVED] XBMC upgrade to Gotham​