OK, so I'm playing Vasari on a small 1v1 random map, and tech up to RA. Only it gets stuck at 75% researched and won't progress any further. Now am I missing something obvious here? Does this tech depend on the number of phase gates you have built? From reading other posts I gather that spare fleet capacity is required (of which I had about 240) but I haven't read anything about research getting "stuck".
I'm not sure that this is a bug exactly so I'm posting here but it does seem a bit odd! For the record I have 4 phase stabilishers built, the 5th about to go up.