Steps to reproduce:

1. Configure site with urlalias_iri TransformationGroup ( in site.ini, [URLTranslator])
2. Create a folder with quotes in name (for example under "Media" section)
3. Add an image to this folder
4. Make sure "thumbnail" is checked in table options for subitems.
5. On the folder view, move mouse over the image icon, verify that the image thumbnail does not appears.

Further notes:

1. ezjscnode call html-encodes thumbnail_url :

   "thumbnail_url": "/var/.../folder"with"quotes/image/748-1-eng-GB/image_small.png"
   

2. also variable url does not seem to be encoded in ezajaxsubitems_datatable.js , #L70,

http://www.w3.org/TR/CSS2/syndata.html#value-def-uri

Some characters appearing in an unquoted URI, such as parentheses, white space characters, single quotes (') and double quotes ("), must be escaped with a backslash so that the resulting URI value is a URI token: '\(', '\)'.