Er, patch E is out:
http://sanguoforciv4.googlecode.com/files/HoTK V2.5 Patch E.exe
It's save game compatible with patch D, but not patch C and previous patch.
changes for both patch D and patch E is as follows:
0.311: fix: fixed hero duplication bug(which is the cause of all the CTDs we are aware of)
fixed hero screen display problem (due to technical reasons random heroes cannot order alphabetically; they are at the bottom of each class, order themselves by the year of creation)
0.310: fix: fixed a bug in army system that non-guard legion core troop also get leader hero's core troop promotion
fixed a bug a hero in army could sometime choose the leader hero's potential promotion when leveling
fixed a bug a newly generated leader hero may be willing to surrender if captured
fixed a bug when Ma Teng and Han Sui are present in a scenario at the same time, Han Sui would still choose Ma Teng as his successor
0.309: fix: fixed a bug when a legion unit who has irritation promotion dies in combat, a CTD occurs
fixed a bug about random heroes don't appear upon creation
balance: Quelling and Suppressing promotion's strength modifier against non-revival unit reduces to 15%
adjust hero trade value to be less dependent on hero's loyalty, increase with game turn and influenced by game speed
rule tweak: removed hero's ability to move all terrain, as it causes some serious AI problem
capture enemy leader triggers temporary leader succession; each more turn captured, there's a chance for the succession is turn permanent
interface: order heroes alphabetically