Oops, I forgot to post a reply here. No, it didn't.

I already had SR1 installed. SR1.2 is SR1 plus some more updates for the Poser Pro full version plug-ins, but I only have the Base version without those plug-ins.

I downloaded and tried out the new changeGamma script, but it made no difference. It still doesn't change the gamma for the required image maps. It only updates if you select "all".

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)