This last update my directory got PR3 from google. And i am afraid google might take it away sometime in the future. I need your opinion. Thanks!
Hi, congrat! my arcade site from PR0 > PR1 > PR3(stay for few weeks) > PR1 (now) So i guess it might be their bug, coz i never update my site for awhile, it's not suppose to boost up to PR3
If you have a directory then you need to be choosy about placing links .. only place high quality website links with relevant content !!
Dont sell any sitewide/footer link with dofollow. Also I fear, in spite of doing this, your directory maybe penalized. Because google is suffering from Directoryphobia.
Why do you worry about it? PR is worthless, try to get better SERP's. Still if you are a PR lover, than don't use any tactics which Google hates the most. ( Black Hat SEO ). You won't get penalized.
Read the blog at aviva directory. It might be helpful for you as he explains his recovery from a google penalty