After upgrading to Ubuntu 10.04 I had a problem using Zotero (a full discription of the problem - on the zotero forum: After few unseuccessfull tries I was given a solution on the zotero forum - to switch off AppArmor (the last replys on the quoted topic), which worked.

My questions are: Is it safe to use Ubuntu with AppArmor switched off? If not - what is the way to have the AppArmor switched on and let Zotero function normaly?