Certain photos failing to upload in album - Upload Failed
 

I've managed to upload over 1500 photos to an album. However periodically in the upload box I get a red exclamation mark telling me that a certain file failed to upload. If I try to re-upload it, it doens't work. I got round this problem by opening the image in paint, and re-saving it as a JPEG. This works. However, I now have an animated GIF and I cannot get it to upload. I have tried to change the name of the file and even uploaded to an image hosting site to use "upload from website" feature. Doesn't work.

I went into Admincp -> Maintenance -> diagnostics

I uploaded that exact file and no errors were found. Here is the result:

Pertinent PHP Settings


file_uploads: On
open_basedir: None
safe_mode: Off
upload_tmp_dir: None
upload_max_filesize: 128.00 MB

Results

No errors occurred while opening the uploaded file for reading.

Can anyone please suggest what I can do to fix this please?

I have also disabled all added products. I have made no other modifications and this is on a forum running 4.2 PL3 installed 2 days ago on a brand new server.

Many thanks