hey,,,, just wanna ask some questions

i have seen a guy wHo IS a really expert with guitar,,, then we jammed,,,,,
he played a ibanez rg dunno what model its old i think,, orignal floyd rose,,,

the main thing is he plays on standard tuning,,then used the fine tuners to drop d... i was just thinking that if he do that it will affect all the strings to sharp,, is it right?????

another question,,,,,why i cant come in to ibanez forum!!!!!!!!!!!!!!!!!!!!