Lanman file transfer corruption

Today I was using Lanman version 2.53 (17-Mar-16) to transfer a pdf from my RPi (Model B os 5.23 2-Apr-16) to my NAS. The pdf document, generated from Techwriter, included some photos.
Some of these photos were corrupted in the transfer as indicated by them being random squiggles starting part way through the picture. Viewing the original from SDFS on the Pi everthing is perfect. Viewing the version on the NAS either on the Pi or through my Windows box shows the corruption. emailing the pdf to myself and downloading on the Windows box then saving to NAS the pdf is not corrupted when viewed on both the Pi and the Windows box. Any thoughts? If it helps I will upload a screen grab of the image in the pdf showing the issue.

Any thoughts?

I would be thinking of upgrading from 5.23 (Essentialy, A development build) to 5.24

Thanks for the suggestion – will try upgrade

Solved. Updated LanManFS module to the one in 5.24 and transfers work perfectly.