I cleaned the contacts off as best I could, even though they looked fine, but my 568EX still doesn't respond to power/settings adjustments from the 622C-TX. I also tried a 622C's on both camera and flash, completely removing the TX from the equation and the same thing happens....the flash fires but there is no control over the flashes settings.
As I was typing I realized that I hadn't tried the 568EX directly in the 6D's hotshoe. The 6D will fire the flash *but* when I go into the menu system the 6D comes up with either the "Incompatible flash or flash's power is turned off" notice...this is for both the "Flash function settings" and "Flash C.Fn settings" menus.
Ok, I thought, let's see how it works on my T2i. It works basically identically...the flash fires remotely, there's no remote control for the settings, and the T2i gives me the same "Incompatible flash..." notices when I pull up the menus.
One last thing I did, but not sure it matters, was simply use the TX as a hand held remote...it would fire the flash but had no remote control for settings/power.
Anybody got any suggestions of something that could possibly be set wrong within the 568EX's settings?
Are there any suggested speedlight models for me to be studying in the case I decide to buy another one? It will be another Yongnuo due to finances (would love to have a Canon, but...$$$). It seems that I recall the early 568EX-II's had issues with battery doors breaking off and a bounce flash issues of underexposure...are those problems squared away? Other models that might be a better choice?
For now, though, I'll use the 468EX-II. Hopefully it will be powerful enough for use in a 32"x32" Neewer softbox. The 568EX will work as a fully manual flash, in TTL mode it seems to put full power out. I was hoping to use the remote control to smooth out my learning curve as much as possible but using the 568EX might be a little more work than expected.
Thanks for your help, everybody!