[napy8gen]

Try this css overwrite: Its better than windows7site give you.

.forumbit_post .forumrow .forumlastpost .threadtitle {color:#000 !important;}

OR if the VSa still catch the css.

You can go to its template and put style="color:#000;" in the a href code.
so that VSa wont get affected,

style manager> style name> edit templates> forumhome templates> forumhome_lastpostby

find:

<a href="{vb:link thread, {vb:raw threadinfo}, {vb:raw pageinfo_newpost}}" class="threadtitle" title="{vb:rawphrase go_first_unread_in_thread_x, {vb:raw lastpostinfo.lastthread}}">{vb:raw lastpostinfo.trimthread}</a>

put in style code:

<a style="color:#000;" href="{vb:link thread, {vb:raw threadinfo}, {vb:raw pageinfo_newpost}}" class="threadtitle" title="{vb:rawphrase go_first_unread_in_thread_x, {vb:raw lastpostinfo.lastthread}}">{vb:raw lastpostinfo.trimthread}</a>

change your color code. that is black.