I have exactly the same issues with my GD hosting. (shared). This has only recently started to occur. Previously I would never see or never notice such errors. Not so anymore. I have been running a closed script that uploads a 20kb file and downloads the same files every 5 seconds. This should present no problems for a server (even an old one). I'm seeing script failures on a regular basis. See script below. GD there is a problem with your server. Uploading a 4mg file takes over 5mins and more often than not will fail. This is unacceptable. When the html fails to load you have a serious problem. Furthermore, files uploaded through Dreamweaver / filezilla and the cpanel file upload also fail on a regular basis.
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