I'm using the 3.5.1 wordpress version, with an oxygen theme. I imported on my website "http://lepetitpateillustre.com" pages from a previous blog that was on a wordpress.com blog : " http://lepetitpateillustre.wordpress.com" using the wordpress "import"/"export" tool. (It was difficult though, I had to do many exports to get everything exported.)
Everything seemed to work fine until I modified the permalinks of the pages and posts, and from then on, one page is not showing at all under the header (it was called " Presse " ), and an other one cannot be modified ( " C'est quoi ? - whatisdat ? " should now be " C'est quoi" only...)
I can see my pages in the page manager and I can modify them, but the changes are not showing once I re-publish the pages.
I put the permalinks to default, didn't work. I deactivated all the plugins, still didn't work. At last I changed to default theme in wordpress, and the pages showed as they should. So it must come from the Oxygen theme?