Re: Warning: Class '…' not found in …
Thanks for this (especially at such a short notice)! I thought at first it was a test but now I realise it's a fix!
To wrap up, I just did a successful SMW upgrade on MediaWiki 1.22, without any outstanding issues though "Initialise or upgrade tables" may not succeed in one go (memory issues most likely). I need to revert now to SMW 126.96.36.199 as SF is not yet compatible with this release, but I'm hopeful that everything will work out.
I'm not aware of anything related to SF not being compatible therefore you may infom Yaron about specific issues you encountered.