Change record status: 
Introduced in branch: 
7.x-3.x
Introduced in version: 
7.x-3.16
Description: 

In releases of Views v7.x-3.13 and older, row names were converted to strings suitable for use as CSS class names using drupal_clean_css_identifier(). In v7.x-3.14 this was changed to using drupal_html_class() which also converted the string to lowercase, which broke theming on many sites.

As of Views v7.x-3.16 this change has been reverted back so it worked the same as v7.x-3.13 or older, so that row CSS class names are no longer converted to lowercase.

Sites that had been updated to work with the (faulty) lowercase behavior will have to be adjusted to the new class names.

At some point this behavior may be made configurable, but it will this new (old) behavior will stay as the standard behavior.

Impacts: 
Themers