There is a new 2.1 firmware I897UCJH2 available from samsung-firmware.webs.com for the captivate.
I have not tried this yet but some people have on the xda forums and claim it has improvements.
[STOCK ROM] I897UCJH2 (Captivate) - xda-developers
Have to use Odin to flash it.
Post your results if you are willing to try this!
EDIT: New JH3 can be found from the same website
I have not tried this yet but some people have on the xda forums and claim it has improvements.
[STOCK ROM] I897UCJH2 (Captivate) - xda-developers
Have to use Odin to flash it.
Post your results if you are willing to try this!
EDIT: New JH3 can be found from the same website