url package reports error in bibtex

[Pedro Pablo =?UNKNOWN?Q?G=F3mez_Mart=EDn?=]

Package: tellico
Version: 1.1.4 3.5.2, Debian Package 4:3.5.2-2+b1 (testing/unstable)
Severity: normal
Compiler: Target: i486-linux-gnu
OS: Linux 2.6.16.4 i686 (Debian Package 4:3.5.2-2+b1 (testing/unstable))

When exporting a bibliography for BibTeX, "ee" entries using the \url package seems to fail.
I think it would be enough if these entries are enclose with "...".

For example, I have an entry with the value http://doi.acm.org/10.1145/611955 in the ee field.
If I select "Use url package" when exporting to BibTeX, I get:

@inproceedings{
    ...
    ee = \url{http://doi.acm.org/10.1145/611955}
}

but BibTeX reports an error. If I manually change the entry to:

@inproceedings{
    ...
    ee = "\url{http://doi.acm.org/10.1145/611955}"
}

(note the " ... " in the entry) BibTeX works properly.

Maybe tellico could be changed to include the "" when using the url package.

Best regards.