After Publish some files 0 bytes

[Teedee]

We are uploading changes to our website & have tried both Quick Upload (Only upload changes) and Full Upload. Both give the same result. After the Publish is finished several files, both index_htm_files and the HTM files, have 0 bytes (viewed in Filezilla) See attachment 0_bytes.jpg. The people maintaining the website report that this has only started happening recently. I have brought the .WEB file back to my office & can replicate the problem.

To recover the situation we uploaded the files required using Filezilla.

The full site can be viewed at www.swanpoolcinema.com.au (the www IS required). The problem has been replicated at www.swanpoolcinema.com.au/test
Any thoughts please?
TIA
td