Captains,
The 757 Hotfix 1503 is not available via an updater but those who are interested can give it a try:

For P3D4
For FSX

The 757 Base Pack 1.5 must be installed before the hotfix installation.

Changelog:
- T/C and T/D calculation fixed
- fuel flow on current leg calculation fixed
- FMC Message MAX ALT FLXXX fixed
- EPR calculation improved

HF1501 and 1502 included.