Also, it would be ideal if more thorough testing is conducted before a release.
Lack of manpower explains everything. The situation of lyx 1.5.x has been better than 1.4.x in that building lyx from svn is much easier (especially on windows) so a power user can help testing the svn version. Because the manpower problem is unlikely to be fixed any time soon, what we can do is trying to make lyx 1.6.0svn as stable as possible during the development process, and release frequent snapshots so that lyx users can help testing the new features. Cheers, Bo