I never encountered such a bug... so for now, I don't know what it is...
The dialogs skip too fast, right?
Normally, they are skipped automatically after a certain duration except if you click on a keyboard key or on a mouse button...
Do they skip without any keyboard or mouse input?
You can try this :
- options -> change the dialog speed
- on the main screen, press F : it will switch to windowed mode. Then exit and restart the game, to play it in a window
Could you please report if it is of any help?