It seems the latest version of the STM8 CPU programming manual is Doc ID 13590 Rev 3 from September 2011. Once in a while, I noticed some inconsistencies in that manual. I'd suggest we collect errata here, so they are not forgotten and ST can fix them in the next version of the manual.
Here's two that I remember:
1) On page 78, the cycle count for "ADDW, SP, #byte" should be 1, not 2.¹
2) On page 83, the mnemonic for the BREAK instruction should be "BREAK", not "SIM".