I had to try twice to get my library to convert to a catalog... First time only 800 of 6,000 photos... I deleted that catalog (made a second copy of my original library I wanted to convert.) RE-installed 1.1... and the second time all my images came across (got 1 or 2 errors on images (not sure what that's about... but if my images are still on the drive, I can just reimport them).
Anyway I deleted that catalog anyway, because I wanted to try to reimport my catalog from Elements with all my keywords, etc... my heirarchy is all confused, keywords are a jumbled mess... some placed in heirarchy, some not. Others duplicated in correct heirarchy and outside of heirarchy (some with same number of photos tagged with each, some with different photos for each tag of the same name.)
Only way I could see to sort this mess out would be if there was a way to merge two keyword tags into one. But I don't see any way to do that... feature request maybe, though I doubt anyone would listen... they don't seem to be too concerned with keywords, quite honestly.
One thing I noticed that's odd:
Most of my RAW shots I appy a custom camera calibration preset to get my colors pretty good from the start. In 1.0, when I went to "presets" it showed that my "xt-calib" preset was being used. In 1.1, they now all say something like "saved preset", but colors are good, so its apparently using my preset. Confusing, since I didn't apply that preset to ALL my images (only for the last few imports, and various files to test my calibration), now I can't tell easily which ones I have or have not applied it to. (other than colors looking strange, of course.)
Also, as I mentioned elsewher. my Keywords are hosed


