o as.hclust.phylo() failed with trees with node labels (thanks to
Jinlong Zhang for pointing this bug out).
+ o read.dna(, "fasta") failed if sequences were not all of the same
+ length.
+
+
+OTHER CHANGES
+
+ o In drop.fossil() the default tol = 0 has been raised to 1e-8.
+
CHANGES IN APE VERSION 2.6-2