Comment 9 for bug 987410

A better workaround is to use the proposed update of gtk2-oxygen package.

This patched package is available into precise-proposed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed.

After you have enabled proposed updates, use a package manager like synaptic (sudo apt-get install synaptic) to select ONLY packages gtk2-oxygen and gtk2-oxygen:i386 (you must select the 2 even you use a x86/64 arch) and apply updates.

Restart you system.

On my system Filezilla work fine with the gtk2-oxygen theme.

If this fix works, please, go to https://bugs.launchpad.net/ubuntu/precise/+source/gtk2-engines-oxygen/+bug/992133 and post a comment to confirm this workaround works.