if you use sylvia

.content div.thumbnailCategory div.illustration {
  width:165px !important; /* Usable range 162px-360px , optimal : Thumbnail width + 40px */
}
.content div.thumbnailCategory {
  height: 180px !important; /* Usable range 172px-250px , optimal : Thumbnail height + 30px */
}
.content div.thumbnailCategory div.description .text {
  height: 130px !important; /* -42px than previous one */
}
#comments div.thumbnailCategory div.illustration {
  width:220px !important; /* Usable range 219px-360px , optimal : Thumbnail width + 95px */
}

for other theme

.content DIV.thumbnailCategory DIV.description {
  padding-left: 10px                    /* For Sylvia theme only */
}
.content div.thumbnailCategory div.illustration {
  width:210px                      /* Usable range 162px-360px , optimal : Thumbnail width + 10px */
}
.content div.thumbnailCategory {
  height: 210px                    /* Usable range 172px-250px , optimal : Thumbnail height + 10px */
}
.content div.thumbnailCategory div.description .text {
  height: 150px                   /* Optimal : Thumbnail height - 50px */
}
#comments div.thumbnailCategory div.illustration {
  width: 295px                    /* Usable range 219px-360px , optimal : Thumbnail width + 95px */
}
.content ul.thumbnails span.wrap2,
.content div.thumbnailCategory div.description {
height: 190px;                        /* Optimal : Thumbnail height - 10px */
}
.content ul.thumbnails span,
.content ul.thumbnails span.wrap2 a,
.content ul.thumbnails label,
.content div.thumbnailCategory div.illustration {
width: 210px;                        /* Optimal : Thumbnail width + 10px */
}

in tab css local rule

(if you register on forum you can suscribe on topic)

ok
local files have been moved

Have you tried the same solution in the new file space?

(I'll advice use plugin local file editor)

With what browser ?

Can you give a link or a screenshot?