In my case, it shows up on this page:
http://www.gacetaeronautica.com/gaceta/wpx-06/wp-admin/admin.php?import=wordpress&step=2
I was trying to import another file with option to download/upload attachment files (with that option off, error doesn’t show up).
My site is hosted by HostMonster, by the way.
Regards,
Carlos
Jeremy,
If it can be of any use, I have one prototype site where a carousel gallery with images containing sizing information appears to work just fine:
http://www.spotters.com.ar/wpx-04/?p=1243
A further two sites, however, do display the wrong image in the carousel if file names contain sizing information.
It appears that the system picks-up the smallest of the image’s thumbnails in the /wp-content/uploads directory instead of the original one.
One sample post confirming the error is available here. Notice two comparative galleries (access password: weird-carousel):
http://www.gacetaeronautica.com/gaceta/wp-101/?p=6378&preview=true&preview_id=6378
Regards,
Carlos Ay