Lost ability to choose 3440x1440 resolution after Yosemite upgrade I have an LG 34UM95 connected via TB on a Late 2012 mac mini.

After the Yosemite install, I no longer have the option of choosing 3440x1440 resolution in the Displays preferences.  It worked just fine prior to the upgrade.

I did do the Option->Scaled bit to see the extended list of  choices, but nothing higher than 2560x1080 shows up.

Can I get my 3440x1440 resolution back?

EDIT: my colorsync profile...





EDIT 2
I just upgraded from 10.10 to 10.10.2.  Resolution stayed the same! Woot!!  So, either the new update fixed the issue, or it  didn't touch the graphics extension.
A bit of a late answer, but this issue is now fixed in Yosemite 10.10.2 - full 3440x1400 (on a macbook air you have to close the lid of your laptop, but it works without hacks!)