I am having similar trouble loading the Jayose Library region. A GM helped me by moving me into the region, but I couldn't load it.
Every time I tried to enter the region, it would start loading, and then soon after say "Loading failed!" in a popup. I have run the updater, no dice. In the Planeshift Setup, I have "Preload Models" and "Keep Maps Loaded" on.
I am running Windows XP on a Dell Inspiron B130 notebook, over a Comcast ADSL connection (with 2GB RAM), and I have never previously had this problem.
Edit: Tried deleting C:/Documents And Settings/<username omitted>/Application Data/PlaneShift. Was able to load a region, but couldn't load the next.
I'm afraid to try to /die so I can get to Ojaveda, as the Death Realm might not load and my character will be stuck in limbo. =O
Edit2: After another attempt, I can't enter the world anymore as my character. (Yakedo Shippuu)
Edit3: I am going to bed now. Hope someone replies soon. =(