BK-Thumb plugin is inherited from Martin Larsen's Multithumb for Joomla 1.5.

Release 2.2:

- mootools issue is solved
- lightbox replaced to slimbox
- slimbox version is upgraded
- tag is visible in article body -  fixed
- Upgrade installation supported

Fix 02 changes:

- multithumb cache moved to "standard" location under ROOT/cache
- Individual category enabling/disabling functionality fixed
- filtering by class fixed

Fix 01 changes:
- PHP4 compatibility issue fixed
- incorrect readmore text and link fixed
- "clear cache" function fixed
- resize of small images issue fixed
- "normal popup" problem fixed

Original plugin is here: http://www.kreacom.dk/mambots/multithumb-for-joomla-15.html