Greetings this is driving me nutz. using 10.6, from the terminal sed ' s/([\t]+)/[:]/g' tabfile > notabfile trying to search and replace tabs from a file in bash. I can do it in perl, perl -pi -e 's/\t/:/g' filename but not with sed. Ive tried it from a simple cat tabfile | sed 's/\t/,/g' any assistance would be helpful. -j