W3C Validation Errors

between hard working for our new site

iam looking on w3c validation and there some errors like:

Validation Output: 17 Errors
Error Line 979, Column 5: No li element in scope but a li end tag seen.

Warning Line 994, Column 144: The border attribute is obsolete. Consider specifying img { border: 0; } in CSS instead.
…et_01.png" alt="Shopauskunft" title="Amafino bei ShopAuskunft.de" border="0" />
Error Line 997, Column 64: Element style is missing required attribute scoped.
…siwyg-content" >