If Nextgen enabled then WP Super Cache isnt working- no lines in end that page is cached.
The pages do not match! Timestamps differ or were not found!
The debug message says: URI rejected. Not Caching
Debug shows
07:43:36 / Output buffer callback
07:43:36 / Buffer is blank. Output buffer may have been corrupted by another plugin or this is a redirected URL. Look for text 'ob_start' in the files of your plugins directory.
07:43:36 / No closing html tag. Not caching.
ob_start
If i disable then cache works- last source code line says its working and showing date it was cahced.
So it doesnt work while nexgtgen in enabled.