I've never seen this error before:
Downloading install package from http://downloads.wordpress.org/plugin/wordpress-importer.0.5.zip…
Download failed. Failed writing body (1477 != 5840)
It happened while trying to install the WordPress importer. sing the back end to fetch the above zip file. When I downloaded the zip from wordpress.org and then used WordPress's back end to upload and install I go a different error. says I couldn't upload the file. I tried CHMODing the folder to 777 to no avail/
I'm on hostdime, I am able to install other plugins and themes fine.
the website in question is http://immigrationgroup.us if that helps.