LyX 1.6.1, both on iMac and MacBookAir, cannot properly import Latex (.tex) files, even if the tex file has been previously exported from a LyX 1.6.1 file, and even if one makes no changes in the tex file after the export. When the tex file is imported back, LyX does not recognize the environments (theorems, lemmas, definitions, etc.), leaves them as plain tex commands, and cannot compile the file (the error dialogue saying "unknown environment"). Unless I am missing something, this is a major bug. I previously worked with v. 1.5.6, and had no problems of this sort.
