|  GitHub Issue  | 
 Title
 | 
| 388 | 
 Clarify the "WebVTT cue settings list" definition.
 | 
| 389 | 
 Add a "User agents that do not support CSS" conformance class.
 | 
| 395  | 
 Add default color and background color names for applicable classes.
 | 
| 400  | 
 Region clarification issue 376
 | 
| 408  | 
 Turn long alt text into longdesc.
 | 
| 410  | 
 Add a paragraph about the reasons why limiting styles.
 | 
| 411 | 
Update line height for lines in regions.
 | 
| 417 | 
Unsigned long issue 414
 | 
| 418 | 
Class override
 | 
| 419 | 
Timeranges clarification
 | 
| 420 | 
Cue setting clarifications
 | 
| 421 | 
Computed position alignment
 | 
| 422 | 
Don't make edge margins depend on aesthetics.
 | 
| 423 | 
Region lines cannot be negative now that they are unsigned long.
 |