Hmm. I think this is a consequence of modularization of the AMS files. You
did this in 1.6.x, yes?
Sorry, I forgot to give my settings:
lyx 1.6.1 installed in ubuntu 8.10 via backport repository, with no
customization and a freshly created default ~/.lyx
We'll have to fix this, if so.
If you do, please let me know what I should do while waiting for the fix in
Until the fix will be done and available on the repository, for the moment I
"demodulized" amsart: I copied amsart.layout in ~/.lyx/layouts, then I removed
and I inserted in its place the content of theorems-ams.module.
Did I do it in the right way? I think so, because it works... ;-))