Hissingsid - 7:11 pm on Apr 26, 2012 (gmt 0)
Are you noticing a change in the behaviour of plural searches? Or have you not noticed the way plurals are handled before?
Have you experimented with pluralising each of the words in a two word term separately?
I've been hypothesising that one of the changes we have seen recently is targeted at the big $ search terms. ie it looks like they have a list of likely spam targets and are hitting them with a specific set of rules but less commercial terms are not targeted with the same rules.