[Orgmode] protecting ascii art

[Scott Otterson]

Is there a way to protect text regions from org mode parsing?  When I 
paste the following under an org mode headline:

                  +-------+  +--------------> future x
          +----+  |predict|  |   +-------+
     x -->|TDL +--|   x   |--+-->|       |
          +----+  +-------+      |predict|--> future y
                                 |       |
          +----+                 |   y   |
     y -->|TDL +---------------->|       |
          +----+                 +-------+

org mode scrambles it.  If I precede each line with a ':', org mode 
still scrambles it, but less so.

Thanks,

Scott