imagefield does not show up? And this is the solution.

warning: Parameter 1 to theme_imagefield_widget() expected to be a reference, value given in /your/site/path/includes/theme.inc on line 617.

If anyone has got this error, this is the compatibility problem with PHP 5.3.

But this can be easily fixed by applying a patch from the following link,

http://drupal.org/node/581074

Find or search the imagefield_widget.inc in the modules directory,

and replace this

function theme_imagefield_widget($element)

And the image field on the Edit page is appear again.