Balsamiq Edit: This has been fixed in version 3.5.8
Steps to recreate:
- Place a "Text Input" object on the canvas
- Select the "Text Input" object so that it is highlighted
- Click in the "Width" field in the Inspector panel
- Enter a new width
- Tap the "Enter" or "Return" key on your keyboard
The width value will be applied, but the Text Input object will also change to Edit mode.
Since there is no obvious way to apply the new width value without hitting enter or return, this appears to be a bug.