Moving WordPress to a subfolder broke a lot of links to images in posts and to other posts themselves. I've spent a little time this morning going back and fixing some – I've only made it back to October – but it doesn't really bother me that much.
Everything before the switch to (b)log-In is history, it's just reference at this point, kept as an archive – it's unlikely that many will be delving through it all. Yes, it will be nice to fix them (and I likely will over time) but I don't see it as a major priority.