Encoded values works fine, but encoded names does not. The OAuth specification seems to allow encoded characters in the parameter names.
Encoded names are needed since Rails expect parameters to have brackets in them. For example when updating the name of a device model one would send out device%5Bname%5D=foo
+1 on this issue.
I have sent a pull request to the oauth gem which fixes this issue. Hopefully they will include it.
great! thanks for the heads up, @ephracis