There's a thread already related to my problem (http://wordpress.org/support/topic/stopping-image-having-underline-when-a-link), but unfortunately trying things out from there didn't help.
Problem 1: in Sidebar images that are links are underlined (you can see that in the Twitter-LiveJournal-etc. block right under Facebook widget)
Problem 2: border-top of aforementioned Facebook widget is annoyingly blue, although in the code of sidebar.php the border is set to 'none':
- <iframe src="http://www.facebook.com/plugins/likebox.php?href=http%3A%2F%2Fwww.facebook.com%2Fpages%2FInside-Social-Play%2F165889356773614&width=195&colorscheme=light&connections=6&stream=no&header=no&height=270" scrolling="no" frameborder="0" style="border:none; overflow:hidden; width:195px; height:270px;" allowTransparency="true"></iframe>
Will appreciate any help!