Comment 2 for bug 65164

Tried with 1.99+2.0rc2+dfsg-0ubuntu1 and it's still the same.
Starting firefox from a console and trying to download http://www.mozilla.com/products/download.html?product=firefox-1.5.0.7&os=linux&lang=es-ES to a FAT32 partition I get the following output:

** Message: plugin_get_value 1 (1)

** Message: plugin_get_value 2 (2)

** Message: plugin_get_value 1 (1)

** Message: plugin_get_value 2 (2)

** Message: plugin_get_value 1 (1)

** Message: plugin_get_value 2 (2)

** Message: plugin_get_value 1 (1)

** Message: plugin_get_value 2 (2)

** Message: plugin_get_value 1 (1)

** Message: plugin_get_value 2 (2)

** Message: plugin_get_value 1 (1)

** Message: plugin_get_value 2 (2)

** Message: plugin_get_value 1 (1)

** Message: plugin_get_value 2 (2)

** Message: plugin_get_value 1 (1)

** Message: plugin_get_value 2 (2)

** Message: plugin_get_value 1 (1)

** Message: plugin_get_value 2 (2)

** Message: plugin_get_value 1 (1)

** Message: plugin_get_value 2 (2)

FG: isPreferred(application/x-gzip,[object Object])
FG: _shouldIntercept(application/x-gzip)
*** exception in validateLeafName: [Exception... "Component returned failure code: 0x80520015 (NS_ERROR_FILE_ACCESS_DENIED) [nsIFile.create]" nsresult: "0x80520015 (NS_ERROR_FILE_ACCESS_DENIED)" location: "JS frame :: file:///usr/lib/firefox/components/nsHelperAppDlg.js :: anonymous :: line 276" data: no]

Saving to my home works.

This is my /etc/fstab:

# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# /dev/hda6
UUID=9e9384a1-88b2-4bda-b69e-66aa63383526 / xfs defaults 0 1
# /dev/hda2
UUID=b3fb2b98-588f-4070-ad99-a838d790a60a /boot ext3 defaults 0 2
# /dev/hdb2
UUID=8660-ED06 /media/Juegos vfat defaults,utf8,umask=007,gid=46 0 0
# /dev/hdb1
UUID=4330-75E7 /media/Seguridad vfat defaults,utf8,umask=007,gid=46 0 0
# /dev/hda1
UUID=4400404500404062 /media/Windows ntfs defaults,nls=utf8,umask=007,gid=46 0 0
# /dev/hda5
UUID=5a440573-3446-4af8-bcc0-b05c24f99bc3 none swap sw 0 0
/dev/hdc /media/cdrom0 udf,iso9660 user,noauto 0 0
/dev/hdd /media/cdrom1 udf,iso9660 user,noauto 0 0
/dev/ /media/floppy0 auto rw,user,noauto 0 0