What issues does the the HTML Validation Pro extension correct?

Converts obsolete align attributes to CSS equivalent (i.e… align=”center” becomes style=”text-align:center;”)
Converts heading tags inside table headers to span with style attribute
Converts obsolete attributes on images to CSS equivalent (i.e… border, hspace, vspace)
Converts obsolete attributes on tables and table cells to CSS equivalent (i.e… border, width, height)
Converts obsolete attributes on horizontal rule (hr) elements to CSS equivalent (i.e… width, size, color, noshade)
Removes content from between iframe tags, convert obsolete attributes on iframes to CSS equivalent (i.e… scrolling, frameborder) and replace incorrect values (i.e… width=”100%”)
Converts big elements to to span with style attribute
Converts center elements to span with style attribute
Removes unnecessary type, charset and language attributes from script and style elements
Removes unnecessary role attributes such as
Converts named anchors to span with id tag
Removes empty target attributes from anchor tags
Removes empty id attributes from html elements
Removes placeholder attributes from inappropriate html elements
Moves incorrectly nested style elements to the head tag
Corrects invalid attributes on embed tags and remove unnecessary end tags.
Converts gallery shortcode tags to figure elements to resolve validation issues when caption is not included.
Corrects incorrect content values on meta elements set to “X-UA-Compatible”
Removes incorrect or obsolete attributes from the time element. (i.e… pubdate)
Corrects or removes obsolete attributes on video elements (i.e… loop=”1″).
Corrects or removes obsolete attributes on column elements (i.e… width=”153″).
Adds name and action values to form elements when value is set to empty.
Remove the size attribute from form inputs of non supported types