TOPIC: Warning: getimagesize error problem

Had same problem with J3 and Smartresizer in combination with the Attachement plugin.
It tries to find some icon gif file in media directory and the getimagesize function gives a warning it can not find the stream (file).

I'm more pragmatic... so, if getimagesize() gives a warning, just make sure it does not happen in such cases.
Therefore add the following two lines just before the getimagesize() function:

Did it for me.

This is a bug. The code does not use full path when calling getimagesize() - it uses the text in the src attribute of the img tag which if it is an absolute path would be the wrong one. One cheap fix is the following:

Modify line 370 of smartresizer.php fromto
This works by stripping the leading slash from the src attribute to change it to relative path. I think under Joomla, when the php file is run, relative paths are relative to the site root.

I would also second suggestion by vdneut (1 post above) in addition to the above fix, because we do not want non-existent images to reveal information about the server.