Hi Ed, Ok, I'll bite: I would be very interested to see any data sets which initially were thought to be e.g. PG222 and scale OK ish with that but turn out in hindsight to be say PG2. Trying to automatically spot this or at least warn inside xia2 would be really handy. Any pseudosymmetric examples interesting.
Also any which are pseudocentred - index OK in C2 (say) but should really be P2 (with the same cell) as the "missing" reflections are in fact present but are just rather weaker due to NCS. I have one example of each from the JCSG but more would be great, especially in cases where the structure was solved & deposited. There we go. Now the matter of actually getting these here is slightly harder but if anyone has an example I will work something out. Please get in touch off-list... I will respond to the BB in a week or so to feed back on how responses to this go :o) Best wishes, Graeme