Version:            (using KDE KDE 3.3.2)
Installed from:    Gentoo Packages
Compiler:          gcc (GCC) 3.3.5-20050130 (Gentoo 3.3.5.20050130-r1, ssp-3.3.5.20050130-1, pie-8.7.7.1) 
OS:                Linux

In table with form(s) there is too much space below the form. The next example makes table with 3 buttons, but the table is nearly 2 timer higher, than the buttons inside. (that works as wel even for form without hidden fields, and for table with only one cell and one form)
As you can see, there is nothing (even no space) inside the table other than the forms. 
Mozilla show such tables compact (no extra space under the buttons)



<table border="1"><tr><td
><form action="any" method="post" enctype="multipart/form-data" target="_blank"
><input type="submit" value="Do it"
></form
></td><td
><form action="any" method="post" enctype="multipart/form-data" target="_blank"
><input type="submit" value="Do it"
></form
></td><td
><form action="any" method="post" enctype="multipart/form-data" target="_blank"
><input type="submit" value="Do it"
></form
></td></tr></table>