These warnings have been (accidentally) commented out in
42aeab2a (uwestoehr; support for table cell rotations;
16-03-2012). In the next commit the warning will be replaced
by a form which is also understood by MSVC.
#define LYX_FORMAT_TEX2LYX 428 // uwestoehr: rotated table cells
#if LYX_FORMAT_TEX2LYX != LYX_FORMAT_LYX
-//#warning "tex2lyx produces an out of date file format."
-//#warning "Please update tex2lyx as soon as possible, since it depends implicitly"
-//#warning "on the current file format in some places (this causes bugs like #7780)."
+#warning "tex2lyx produces an out of date file format."
+#warning "Please update tex2lyx as soon as possible, since it depends implicitly"
+#warning "on the current file format in some places (this causes bugs like #7780)."
#endif
//} // namespace lyx