WC3 validation fail: rel="gallery-all" document type does not allow element "a" here; missing one of "object"... [#1675884]

Hello! I'm very new to drupal, and would like your help.

Colorbox is working fine on my drupal 6.25, in my views & views slideshow 6.x-3.0. However when I run this site's link through validator.wc3.org: http://www.uoscorp.com.my/brother_inkjet_printer_ink_cartridges_consumab..., it produces errors on the colorbox items:

Line 215, Column 539: document type does not allow element "a" here; missing one of "object", "span", "bdo", "applet", "iframe", "tt", "i", "b", "u", "s", "strike", "big", "small", "font", "em", "strong", "dfn", "code", "q", "samp", "kbd", "var", "cite", "abbr", "acronym", "sub", "sup", "label", "ins", "del" start-tag
…gefield-field_image" rel="gallery-all"><img src="http://www.uoscorp.com.my/sit…
✉
The mentioned element is not allowed to appear in the context in which you've placed it; the other mentioned elements are the only ones that are both allowed there and can contain the element mentioned. This might mean that you need a containing element, or possibly that you've forgotten to close a previous element.

One possible cause for this message is that you have attempted to put a block-level element (such as "<p>" or "<table>") inside an inline element (such as "<a>", "<span>", or "<font>").

For an earlier colorbox issue, I have already done the fix #4 in http://drupal.org/node/527586 successfully.

Can anyone please help me, thanks in advance.