I am beginning to believe that insecta does create a problem for Macroevolution, because of evolutionists consitent need to change and revise the insectal phylogenetic tree.
Why should this represent a problem? There are a hell of a lot of insects and more genetic information on them is being gathered all the time, this is bound to lead to a lot of revision of phylogenetic trees, especially ones based principally on gross morphology.
Just to add to the many suggested links there is an interesting review in PNAS looking at different theories of insect wing origins and how some can be tested through developmental approaches, (
Jockusch and Ober, 2004).
TTFN,
WK