The FileDownloadController sets the content-length header based on the LogicalFile.size. Currently these LogicalFile.size(s) may not reflect the exact, actual on-disk file size and is often some length less than the actual file size. (This is due to a bug/feature of the TDS which beautifies file sizes which is being addressed by the PCMDI and Unidata collaborator groups.) As a result, downloads seem to be truncated and are missing some ending portion of the file (for example when using wget.)