Gerard Roe's paper - this Wiki text is obsolete 

I just added this section because someone badly needs to update this completely obsolete article. Because of the well-cited 2006 article below, pretty much all the criticisms in this Wikipedia article are out of touch. The readers will be grateful to anyone who will update it - but the amount of required work is nontrivial.

Many of the doubts about the theory disappeared in 2006 when Gerard Roe published a paper, In defense of Milankovitch, in Geophysical Research Letters, Vol. 33, L24703, doi:10.1029/2006GL027817, 2006.  He correctly identified the insolation with the time-derivative of the measured ice volume, rather than the ice volume itself, and obtained a spectacular agreement that has solved the 100,000-year problem and other problems below. By taking the derivative, the short-duration, higher-frequency cycles are amplified. Until this text takes Roe's paper into account, you should realize that it is obsolete.