Started using Safari about a year ago. This has been a problem for me persistent through versions of both Safari and Adblock. I can't find the issue discussed anywhere, sorry if I am posting a known issue.
Every so often, when I launch Safari, Adblock plus has "turned off" in that ads load on the pages. I check preferences, it *should* still be blocking, but it is not. I uncheck the enable box and recheck it, close preferences and reload the page. Voila, blocking as normal.
I've tried uninstalling/reinstalling both Adblock plus and Safari. Does not seem to solve the problem. By "periodically" I mean every few weeks. It will be a problem then daily (or whenever I launch Safari) and then after a week or two, will stop happening. Then in another few weeks, a month or two...it happens again.
Need ideas.