[Zope-CMF] Customized image_edit causes browser hang on upload, even with no changes

[seb bacon]

<fairly useless comment>
 I had something similar yesterday with the stylesheet properties.  I
 clicked 'customize', did nothing to the customized file, and the
 display went screwy.  I deleted the customized file, and everything
 went normal again.
</fairly useless comment>

seb

* Brad Clements <bkc@murkworks.com> [010718 22:46]:
> I want to customize image_edit so it can create a thumbnail if the image is uploaded as 
> a child of a custom Folder meta-type.
> 
> I went to the content folder, found image_edit and clicked "customize"
> 
> In the manage screen of the custom image_edit, I clicked save without making any 
> changes.
> 
> When I try to upload an image.. my browser now just hangs.
> 
> If I rename custom/image_edit to image_editXXX, the retry the image upload, it works.
> 
> There's something very strange happening here, any ideas?
> 
> CMF-1.1 on Zope-2.3.3 on RH Linux 7.0