your ati card is so old, really old, i sold mine, old in 2008
if i remember correctly the hardware acceleration for all the cards under radeon x600 is not working properly, at least on my ati 9200 is not working properly
i have to disable kwin desktop effects so flash works at decent speeds with flv videos on most sites
to make things simple, a ati 7000 is not the best option for linux anymore, at least i wouldn't bother trying to fix a broken driver for a weak card
many users just find a nvidia 5200 or a 6200 and let the ati for old win machines that could use it or sell it if someone can find a use for it