Cache clearing craziness, taxonomy and locale notes

Delete one term and every cache on your entire site gets cleared?

cache_clear_all() in `modules/taxonomy/taxonomy.module':592
taxonomy_del_term('345') in `modules/taxonomy/taxonomy.module':613

What's this about clearing the language cache because the organic groups page is visited in Italian? There's a ton of these:

Array()) in `includes/menu.inc':418
menu_execute_active_handler() in `index.php':15
#8bf7571b T+0.521344 [DEBUG ] cache_clear_all('locale:it', 'cache') in `modules/locale/locale.module':213
locale('settings page') in `includes/common.inc':732
t('settings page') in `modules/contributed/og-5.x-4.0.tar/og/og.module':2740
og_requirements('runtime')
call_user_func_array('og_requirements', array('runtime')) in `includes/module.inc':406
module_invoke_all('requirements', 'runtime') in `modules/system/system.module':1840

Resolution