I got the same error and posted it, too. Still don't know what it means. All I did find was that the version didn't work very well (2.5.x). My shared folders were taking an extremely long time to load into the library and it kept freezing. Even more so than normal. I went back to 2.4.4. So far, so good.

It sure would be nice to know what the error message means and what can be done to fix it.