When creating a SubVI by selecting a piece of code from your block diagram, the "error out" indicator created is not the standard indicator with grey background as available in the controls palette.
On the contrary, it is similar to the standard "error in" control with white background controls.
To me it results on a poor style and readability, and I use to replace it manually with the palette indicator.
I suggest using the default error indicator when creating a new subVI (and anywhere else if possible).
Moved to Bug database: Bug 1002090