cannot handle more than 29 refs

I get this message whenever I use --tags with git-pull with certain 
repositories. The git repository is one, and so is my local repository. 
I googled and got nothing. I grepped the git archive and got only 
show-branch.c.  Can this be safely ignored? Is it a known shortcoming, 
or something else entirely?

--
Jon Nelson [off-list ref]