I posted this in the i9000 thread but i think it should've been here, the captivate thread.
Excuse me for posting this rookie issue here but I hope I can get bit of help. I also have the bootloop but I can't get into recovery at all to repair it. I've been holding the volume buttons and power while powered off and it just cycles the AT&T logo. Have tried a few different combinations like the volume up and power; volume down & power; home, vol up & down, power; but just keeps restarting. It gets to the first cyanogen mod boot screen, after the ATT world phone logo, but then reboots. Any ideas I can try to get this working again?
I'm able to get into download mode immediately via removing battery, attaching usb cable to pc, holding down volume buttons and then putting the battery back in. Opened Odin 1.85, see it recognized and placed the semaphore.tar file in the bootloader field and it seems I'm back up.
Galaxy S3 (i747)
Galaxy S2 (i777) - ShoStock 3 v4.0 (Daily)
Galaxy S (Captivate) - CM11 0401Nightly