Description of problem:

When anaconda passes bug data to libreport, one of the elements is named "anaconda-tb-<RANDOM>".
I didn't trace its origins completely, I reached only up to this code:

python-meh-0.26/meh/handler.py

        for fpath in self.conf.fileList:
            try:
                with open(fpath, "r") as fobj:
                    # would be better to use the full path here, but libreport
                    # doesn't allow '/' characters in the item name
                    filename = os.path.basename(fpath)
                    if filename not in params:
                        params[filename] = fobj.read()
                    else:
                        params[filename+"_file"] = fobj.read()
            except:
                #skip files we cannot read
                continue

My guess is that self.conf.fileList contains "anaconda-tb-<RANDOM>", and it gets read and added to params in the code above.

This isn't the best name to use. Consider what users of these bug reports might want to do.
How about "search for the string FOO in all anaconda-tb's in all filed BZs"?
See the problem? You can't fetch "anaconda-tb" BZ attachment by name, because it has the variable -RANDOM suffix.

Here is a real-world example: BZ 875312. To satisfy this BZ, I want to add

     %attach: anaconda-tb

line to bugzilla_formatdup_anaconda.conf. Whoops, this won't work.

I suggest changing anaconda to use "anaconda-tb" element name.