Rather belatedly, I have posted lists of errata and footnotes to Averbakh's work. These are applicable in the main to the English language edition. I have not provided sources for all the comments. In many instances the information is sufficiently well known as to not warrant any objection.
The suggested footnotes are available here and the errata here.
Please point out any errors or proposed changes. I can be contacted at otiosechessnotes at gmail dot com.