The Like button is placed near the edge of an HTML element with the CSS overflow property set to hidden, so the comment popup is clipped. To fix this, you can change the style for #art-main of overflow:hidden to overflow:auto. Doing this can grow the page when the popup is shown and shrink it back when it's closed again.
I wish to use a one line button actions. I use JFBCLike for the fan page and JFBCShare for the site page. It works perfectly, but when you select the like button the popup goes down and you cannot see it well.
This doesn't sound like anything that we could easily control. Keep in mind that Facebook has also recently deprecated the Like Box functionality (called JFBCFan in JFBConnect). It is being replaced by the new Page Plugin (which we plan to support in the next JFBConnect release). The Like Box widget will no longer work starting June 23rd. If you want more info, see developers.facebook.com/docs/plugins/page-plugin
JFBCFan would be more appropriate than JFBCLike for the fan page, but I need a line buttons and JFBCFan shows also the square fan page image and the name of the page. I think it is not possible to hide them using css display:none;
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