Am running my website (http://geekiest.net) more than 5 years using BlogEngine (using XML as provider). Now it is hosted on Arvixe Shared Hosting (Business class Asp Pro).
After upgrading my Blog to 2.6 (from version 2.0), my site is getting 503 error frequently as the App pool is getting stopped. I tried to solve the issues (tried to change provider to SQl SERVER too), but failed.
I have changed imagehandler page, related post page. and added two extensions, to add Adsense and retweet and other social media links.
Now i moved back to Version 2.0 and everything works fine.