Special characters in the EXIF data confuse wp_get_attachment functions

[arminbw]

Digital cameras often put special characters in the EXIF data of their images (e.g. German "Umlaute"). After uploading such images parts of this data are put into the database.

Afterwards the function "wp_get_attachment_thumb_url" will return the URL of the full-size image, instead of the thumbnail.

[arminbw]

small picture with troublesome EXIF data

[arminbw]

The second attached image (no_thumb_no_middle.jpg) contains no EXIF data, only a single IPTC entry featuring a copyright symbol (a not so unrealistic scenario).

After uploading, a thumbnail- as well as a middle-sized image are created.

But "wp_get_attachment_image($imageid, 'medium', false)" will only return the full-size image, thus breaking all layouts.

[arminbw]

Just found ​http://trac.wordpress.org/ticket/6412 which adresses these issues.