Rated 3 out of 5 stars

hi,
same thing without theme, so now, that's sure, the trouble is between "hide caption titlebar plus" and hide bookmarksbar":-(

yes same thing with no theme
and no, there is no trouble when the tool bar becomes visible by hovering "your" button, and, even, it' stays good until the tabs are hovered....(appears as soon as you stop hoovering tabs)
mystery for me :-\
thanks...
ps : °o° in your tracker, am I obliged to register, to post a bug???

§§§

hi, so now we've found that if I lock the task bar of xp, there's no more white line but that's xp's taskbar which hides the top of the navbar :http://files.getwebb.org/view-cre65ntv.htmlsame behaviour with a new profile and only these three addons -_-no more troubles if hide bookmarks is off...thanks...§§§hi, to answer you :non, I'm not sure at all ;-)and no, if if remove hide bookmarkstoolbar, that's ok...( personally I do not understand anything!!!)thanks for interestto try to be perhaps clearer, here is an extract of what I've sent to the two other developers :I did some tests with a new profile and I failed to see which extension is involvedconditions :the tasks bar of xp in top (no problems when it is in bottom)extentions :-hide caption titlebar plus 2.1.7rc : https://addons.mozilla.org/fr/firefox/addon/hide-caption-titlebar-plus-sma/-noia 4 theme :https://addons.mozilla.org/en-us/firefox/addon/noia-4/versions/ (with all settings switch off except : "fix for hctp")when there's only noia (with only hctp fix activated) and hctp (my settings : http://files.getwebb.org/view-cre65o55.html)there's this little line but not awkward at all (you can open bookmarks toolbar without problem, just this very little line)but if you install hide bookmarksbar, that becomes frankly ugly, line becomes two or three times largerI think I have seen changes hovering tabs, that's all I can tell youi thought that it was hide bookmarksbar troubles,but as the line is create with noia and hctp, i really don't knowthanks... §§§so, now it's sure, after testing with a new profil, the trouble is between :-xp tasks bar at the top (pro sp3) -followings add-ons in ff 4.0.1 : noia 4 theme (with all settings switch to off, except fix for hctp) :https://addons.mozilla.org/en-us/firefox/addon/noia-4/versions/hide caption titlebar plus : https://addons.mozilla.org/en-us/firefox/addon/hide-caption-titlebar-plus-sma/versions/(my settings : http://files.getwebb.org/view-cre65o55.html)hide bookmarksbar...thanks...

This review is for a previous version of the add-on (3.2.1-signed). 

Could you maybe post a bug in my tracker at http://code.google.com/p/hide-bookmarksbar/issues/entry ? That would be easier to organize and I get notifications of comments.

You said this happens with only these three addons. Does it still when you disable one of the other two addons?
Does it still happen while the Bookmarks Toolbar is visible?