I've tested 1.30 with indiserver 1.7.4. with my own script for the needs of spectroscopy. The simple script communicates with the indiserver via indi_setprop and indi_getprop. Everything I tested worked well with the exception I mentioned earlier in this thread. The problem existed also in 1.29 so is more a problem of the code, not where the code resides.
So once again:
Human will is the kingdom of heaven!