plugins’ images won’t display – how to diagnose plugin conflicts? i tried x,y,z

Since I installed some new plugins, the images for wp-postratings, wp-email, and language translator stopped appearing on my blog.
imagiscape.ca/blog

I de-activated all the new plugins.
I know the plugin ‘comment relish’ has several flaws – at least the original version did. (Several different complaints are in the comments here.)
Could it be affecting my display even though it is not activated?
If I delete it from my plugins directory, there is still a table wp_cr in the database, but it does not look suspicious – it’s just a table of addresses to which comment-related emails have been sent.
Might it’s installation have added or modified something in another table? I checked wp-options but saw nothing.

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I tried Firebug, Firebug for IE, IE Developer Toolbar, and Web Developer Toolbar.

None register/acknowledge these image display errors!

Firebug does show if a style element is over-ruled, but I cannot see in any of the 4 tools anything about two or more plugin scripts conflicting. Is there a way?

Thanks.
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(P.S. Comment Relish has been modified by another author. I installed the problematic version first, then installed the modified version, which is currently deactivated.)