I believe it was just the first version of the 50/f1.4 (8 element). I haven’t heard about other lenses causing issues.
For what it’s worth, the red/green R is only significant on the S-series bodies. The Spotmatics are all green (I think) and don’t have any compatibility issues.
Ricoh GRII | Pentax SV, SP-F, MX & LX | Leica M2 | Olympus Pen F + 35RD | Minolta Autocord | Hasselblad 500cm + SWC/m