I have had this problem for weeks and for the life of me I cannot determine if it is on my end; LLs end or somewhere between.
At random times any combination of textures, objects, avatars, etc stop loading wherever I am. For example, yesterday I was trying on a hairstyle that offered a hair base. I applied the hair base, and took off my BOM one, but the textures didn't change. Refreshed textures multiple times; nothing. Relogged, I'm now a cloud. My viewer only rarely indicates a connection issue now, and even now shows green as I am typing this, yet I can't see my avatar. The rest of the world is fine aside from me. Earlier yesterday night, I could see myself and other avatars, but my house would not render. I have tried Firestorm (my normal viewer), Alchemy, and Black Dragon. I am running an ethernet connection, and my other games work fine with only occasional lag spikes for a few measly seconds, and not this constant refusal to load that SL seems to be doing. I'm lost at this point.