update failed

[alicemoon]

my most recent update was successful except for the following files
libxslt1.1 and xsltproc

I get the following message once the update fails
W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/libx/libxslt/libxslt1.1_1.1.22-1ubuntu1.1_i386.deb
404 Not Found


W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/libx/libxslt/xsltproc_1.1.22-1ubuntu1.1_i386.deb
404 Not Found


as they are security updates I assume they are important - should I be worried that they are not downloading and what should I do?
thanks in advance

[shadowjester]

Right click on the update manager, click check for updates. It'll pull down a new update list with the updated file locations.