Just uploaded the latest update of the Fold Category List plugin (v1.0b6) to include the following changes:
- Fix a bug where truncated descriptions were not working as link title attributes for sub-categories in the list
- Added 'current_cat_ancestor' class to ancestor links of the current category
- Deaden links on the current category
The introduction of a hierarchy styling class echoes the capabilities of the companion Fold Page List plugin, though not yet to the same extent.
As usual, full information about the plugin and a link to the current version can be found on the Fold Category List support page.