Tabs .css gets broken after updating AjaxControlToolKit to v 20.1.0.0
Hello,
We're experiencing issues with .css being broken after the library update.
Original:

After update:

The .CSS:
/* Normal Tab Theme Ajax */
.ajax-tab-normal-theme .ajax__tab_header
{
font-family:arial,helvetica,clean,sans-serif;
border-bottom:solid 1px #808080;
font-size: 10pt;color: #003399;
}
.ajax-tab-normal-theme .ajax__tab_header .ajax__tab_outer
{
background:url("/images/tab-sprite.png") #d8d8d8 repeat-x;
margin:0px 0.15em 0px 0px; /*space between tabs */
border:solid 1px #a3a3a3;
border-bottom-width:0px;
}
.ajax-tab-normal-theme .ajax__tab_header .ajax__tab_tab
{
padding:0.35em 0em 0em 0.4em; /*padding within the tabs */
text-align:left;vertical-align:bottom;
Width:138px;height:21px;
}
.ajax-tab-normal-theme .ajax__tab_hover .ajax__tab_outer
{
background: url("/images/tab-sprite.png") #bfdaff repeat-x left -1300px;
}
.ajax-tab-normal-theme .ajax__tab_active .ajax__tab_tab
{
color:#fff;
}
.ajax-tab-normal-theme .ajax__tab_active .ajax__tab_outer
{
background:url("/images/tab-sprite.png") #2647a0 repeat-x left -1400px;
}
.ajax-tab-normal-theme .ajax__tab_body
{
font-family:verdana,tahoma,helvetica;
font-size:10pt;
/padding:0.25em 0.5em;/
background-color:#edf5ff;
border-top-width:0px;
}
Could you please help resolving this problem?
Thanks!