Not many:

- incorrect results in rare cases if using malloc
  => default for ADOL-C memory allocation changed to calloc

- storing values in adoublem matrices via subscript operator does not
  work correctly

- new and much stricter parser of gcc version >= 3.4 does not accept all
  active (adouble, adoublev, ...) code even if users code seems to be right.
  Please use an earlier gcc version if you encounter such problems.

