Fortunately, they'e not. Not to mention the fact, that it is *why* we have CSSU at all - don't expect such effort from Nokia - I would be very careful with installing any major update from them (like I was with PR1.3.1, probably I was "last" one who installed it ), considering steps Nokia is taking to suck Maemo developers/users into their N950/N9/'w$nphone to be' kindergarten. Add to this common practice by many big tech corporations (injecting things inside closed source part of updates that reduce performance, to their "end of support" devices), and You *should* be very careful when updating anything from Nokia.

On the other hand, I trust CSSU/KP devs fully, because they earned it - due to hard, non-profit work and awesome level of expertise (both providing fixes and features,that Nokian's stated to be impossible on our Device - see USB hostmode for example - or not feasible to write, where portrait mode is main example).
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I'm not commenting on other things, because freemangordon, Mike Fila and woody (sorry, can't cat Your after-nick numbers from memory ) did this already too well.

/Estel