Command line autocomplete no longer escapes special characters on certain operations

When I'm specifying arguments to the mv or cp commands at the command line and I hit tab to autocomplete the argument, it lists the argument without special characters escaped. For instance, it lists ajax-loader(1).gif literally when it should list it as ajax-loader\(1\).gif

Autocompleted arguments to the cd command are listed correctly though. I don't know what's going on. I'd appreciate any help / insight.