Unfortunately for those of us that use Tumblr this is a byproduct of the blog site. I tweaked my site several times while developing it and could not find anything that really processed well across different computers, or devices for that matter. I found that going away from an design based or image based background, and using a simple clean background has worked best for me. But that ultimately is a preference. Perhaps a differnt blogging website would soot your needs if that choice doesn't work for you. There is always blogger, wordpress, and livejournal are all alternative options.
Happy Hunting =)
answered Jan 19 '13 at 09:42