The problem is replicable using Firefox 3.0.8+nobinonly-0ubuntu2, Firefox Shiretoko 3.5~b4~hg20090330r24021+nobinonly-0ubuntu1, Epiphany 2.26.0-0ubuntu3.
There is no problem instead using Konqueror 4:4.2.2-0ubuntu3 nor using Opera 9.64.2480.gcc4.qt3.
The problem is replicable using Firefox 3.0.8+nobinonly -0ubuntu2, Firefox Shiretoko 3.5~b4~ hg20090330r2402 1+nobinonly- 0ubuntu1, Epiphany 2.26.0-0ubuntu3.
There is no problem instead using Konqueror 4:4.2.2-0ubuntu3 nor using Opera 9.64.2480.gcc4.qt3.