Was just uploading a new addon into Uniadmin 0.7.9 and it kept saying "No addon uploaded"
Finally twigged that the new addon I was uploading was about 5MB in size.
My upload_max_filesize = 4MB
The default recommended setting (php.ini-recommended) is 2MB
Not sure if it's possible but with addons getting bigger and bigger it might be worth putting some better error handling on this condition so that if the upload_max_filesize limit is hit the error returned to screen reflects that this setting may need to be increased.