Hello,
There is an issue with the PS3 port. The included set of libretro cores bundles with the PS3 version is incorrect Since v1.0.0.2 we have not seen a clean set. What i mean by clean set. All included cores are working / operational and all cores from previous versions are also present.
These cores have been included in the port recently and have issues. TGBdual - White Screen Cannonball - Crashes back to XMB (PS3’s) / Corrupts CFG file. Fuse - Does not work.
Then there is various cores that come and go from version to version. v1.7.4 was missing. MAME2003 mednafen_lynx mednafen-SuperGrafx
v1.7.5
MAME 2003 (Returned 
)
mGBA (disappeared 
)
-Then the included mention non working cores from above.
Just other random things
BlueMSX could be a good candidate that could perhaps be a Stable core for the PS3 with a little work.
Even if some of the systems the core emulates like ColecoVision could be standalone, as it a bit of a process with changing emulated systems via the Core Options for blueMSX,. IMO i think this core is close. .
Also, I recall when mednafen_PCE_fast emulated SuperGrafx in the past, but seems to be no longer the case (?,).I also recall a few pst version’s (of retroarch) having a mednafen_supergrafx core (currently missing). Should PCE-Fast emulate SuperGrafx? and if not then the Ps3 port needs the mednafen_Supergrafx core as well.
The UI and frontend is very stable and operates very well. Just missing the correct core lineup …