Errors when uninstalling

When uninstalling profile 2, I get the following error messages when emptying the cache or displaying the module page. Having read the other reports concerning similar issues, I confirm that I get these messages even when Entity api is enabled. Moreover, when I reinstall profile 2, these messages do no longer appear. Any idea why these messages appear after an uninstall ?

Notice: Undefined index: fieldable in field_ui_menu() (line 71 of /home/serge/public_html/modules/field_ui/field_ui.module).
Notice: Undefined index: fieldable in i18n_field_menu() (line 24 of /home/serge/public_html/sites/all/modules/i18n/i18n_field/i18n_field.module).
Notice: Undefined index: fieldable in field_group_menu() (line 25 of /home/serge/public_html/sites/all/modules/field_group/field_group.module).
Notice: Undefined index: label in rules_entity_type_options() (line 282 of /home/serge/public_html/sites/all/modules/rules/modules/entity.rules.inc).
Notice: Undefined index: controller class in entity_type_supports() (line 68 of /home/serge/public_html/sites/all/modules/entity/entity.module).
Warning: class_implements() [function.class-implements]: object or string expected in entity_type_supports() (line 68 of /home/serge/public_html/sites/all/modules/entity/entity.module).
Warning: in_array() [function.in-array]: Wrong datatype for second argument in entity_type_supports() (line 68 of /home/serge/public_html/sites/all/modules/entity/entity.module).