Firefox issues: Spacing between cells in header and images have partial backgrounds on hover

1)I can't seem to find where the space between the top cells and bottom cells of my header is coming from in firefox. It's ok in IE. I put my header in a table and gave the table cellspacing and cell padding =0.

2)How do I get images in the main gallery area to not have a background (or border) when you hover over them. I would like text to have the hover border and background. Note - I put gallery in a table (local/theme.tpl) and the gallery portion is in a class .middle (in addition to the default gallery classes and id's)

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Gallery version = 2.0.2 core 1.0.0.2
PHP version = 4.4.3 cgi
Webserver = Apache/1.3.37 (Unix) mod_fastcgi/2.4.2 mod_auth_passthrough/1.8 mod_log_bytes/1.2 mod_bwlimited/1.4 FrontPage/5.0.2.2635.SR1.2 mod_ssl/2.8.28 OpenSSL/0.9.7a PHP-CGI/0.1b
Database = mysql 4.1.20-standard-log
Toolkits = ArchiveUpload, Exif, ImageMagick, NetPBM, SquareThumb, Thumbnail, Gd
Operating system = Linux box98.bluehost.com 2.6.15.7 #2 SMP Mon Jul 10 12:04:15 MDT 2006 x86_64
Browser = Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.6) Gecko/20060728 Firefox/1.5.0.6

A jungle out there? Nah, it's a sircuss...