So... I like playing around with the ICs. I tested them all, except for the one available at level 60, and here is what i found:
All of the ICs work, with the following exceptions:
Counter MC1420 Broken? Sign can be created, but will not toggle output.
Clock MC0420 Error message -- Unknown IC detected: mc0420
2InputXNOR MC3021 Broken. Supposed to output a high if and only if the two inputs are the same. (You use 2 of the 3 possible input pins.) Currently behaves like an AND circuit, however, and will not produce high output when all inputs are low.
InvRSNOR MC3031 Broken. Inconsistent. Side pins will toggle high. Center pin will switch output to low when input is high, but the output state will revert to high when center pin input is toggled to low. It may be that the pins are not correctly identified on the Craftbook wiki.
RSNAND MC3033 Broken -- seems to just act like a RSNOR latch.
DownCounter MC3101 Broken. Error message -- You don't have permission to use mc3101
Counter2 MC3102 Broken. Error message -- You do not have permission to use mc3202
LightSensor MC1262 Sort of Works. Will detect light differences, but the triggering thresholds seem off, and only seem to be triggerable up to a light level of 7.
PlayerDetector MC1272 Works. Not all configuration options work, though.
EntityDetector MC1271 Broken. Error message -- You don't have permission to use mc1271
LightSensorSelfT MC0262 Sort of Works. Will detect light differences, but the triggering thresholds seem off, and only seem to be triggerable up to a light level of 7.
EntityDetectorSelfT MC0271 Broken. Error message -- Unknown IC detected: mc0271
PlayerDetectorSelfT MC0272 Works. Not all configuration options work, though. Also, it seems that one can create it before reaching level 59 of Engineer.
Perlstone MC5000 Unknown -- I was not able to test this one yet.
Accordingly, at least 13 ICs are broken or not completely configurable. Three (maybe four) of these can be fixed by adding the permissions to the appropriate level of Engineer. Others are messed up at the Craftbook level: If I had to guess, I would say that something in the internal Perlstone-like scripting for those ICs has typos, or those ICs became incompatible after the last update.
It would be nice to get these fixed, but most of them have work-arounds or alternatives able to be made with traditional redstone engineering. The absence of a working entity detector IC, however, makes for much dark, sad, and lack of potato.
I have sort of figured out how to correctly use the variables on most of these ICs, although a few still boggle me. For example, the player detector ICs are supposed to be able to detect groups in addition to individual players, but I have not been able to figure out what group names from HC are hooking into the Craftbook system, if any.
Hope this helps a bit!