I installed the 1.4.8 version today.
I have two sites interlinked with almost 7000 posts and I have changed the permalinks structure (it’s the same structure but different a little). so when I activate the plugin, the page doesn’t load, it show a blank page. I have to reload that page three times and wait 10mn and if I’m lucky the I got redirected to the right url or it’s always showing that blank page (page not loaded).