This has been previously mentioned in other threads the past couple of weeks. The only occasion where I have seen this is once in awhile after using the dictionary and returning to the page. A quick select/deselect of the menu, or page back/page forward refreshes the page and font. I have never seen this occur when simply reading and turning pages.
I suggest you do a search within this sub-forum -- there are many, many posts on lighting issues. Starting another duplicate thread is not necessary.
Last edited by Skydog; 10-21-2012 at 11:50 PM.