Ctrl+Z doesn't work

[soulgate1]

after pressing Ctrl+Z Lightroom4 applies a certain preset instead of undo

[chairmoistener]

It's January 2014 and I'm still having this problem too - Can we please get a permanent fix asap, Adobe?

[__Flook__]

I have this exact issue since Lightroom 3.  It has now followed me through every Lightroom 4 update and Lightroom 5.  Now on a new computer, new ssd drive, fresh install of Windows 8, 16GB of Ram, and Lightroom 5 and I still get the issue.  You would think after a couple years this bug would be fixed.

As most have said, you restart Lightroom and it will work fine for a period of time.  Eventually you try to undo something and a preset gets applied instead.  On goes the cycle.  Maybe they will fix it in another couple of years.

[bar_foo]

According to the Lightroom 5.5 realease notes, one of the issues fixed is "Undo function failed and applied a preset instead." Maybe this will finally be resolved...