Are you sure they changed? Please tell us how you know? Before I stumbled on WOB today, I was shuffling the old website forum and came upon this same question. It appears that any map changing mod may alter the seed numbers- take those mods out and try it again to see the old numbers return the old maps. I believe that's 1.05, not v1.06, and I always play vanilla so I can't test it myself. Check the old forum for specifics.