I think I found v.1.0 on xda-developers.com; if you can't find it PM me and I can email it. I can say that since using v.1.0 (and using the same settings that I had when I had 1.1 in the rom, no speakerphone problems.
so ,say one doesn't want to reflash again and has this problem and has advanced configuration, is there a way to get around it the whole speakerphone phenomena?