incoherent behavior between XP & Win 7 theme

[GoogleCodeExporter]

I like the idea of hide unnesseary items to enlarge the browsing area, so Hide 
Caption Plus is a must have add-on for me. Recently I upgrade to Win 7 and 
found an incoherent behavior of HCP.

as the GIF show: I use menubar as bookmark toolbar, and it hiding by a simple 
stylish script:

/* begin css */
@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);
#toolbar-menubar{
  margin-top: -25px !important;
}
#toolbar-menubar:hover {
  margin-top: 0px !important;
}
/* end css */

It work fine in xp and Win7 classic theme. But using aero, the length of 
#toolbar-menu "hover" trigger area seem change...

Here is a demonstration I capture the different, for more easy to notice, 
change #toolbar-menubar{margin-top:-25px!important;} to -12px deliberately

- Please provide any additional information below.

- Please provide your system info by using this url (with installed hct+):
chrome://hidecaptionplus/content/system_info.html  (can be copy/pasted as
text also)

- If there are visual issues, please provide also screenshot/s (preferred
uploaded here instead of external link)

Original issue reported on code.google.com by huang3...@gmail.com on 23 Jul 2011 at 6:10

Attachments:

• untitled.gif

[GoogleCodeExporter]

google seem to take the gif attachment as an png....

it's a 10seconds long animation gif

Original comment by huang3...@gmail.com on 23 Jul 2011 at 6:12