Yes and it's browser dependent. Generally once you're in the range of ~2,000 characters the URL is too long.

http://stackoverflow.com/questions/417142/what-is-the-maximu...

There is a maximum length for URLs in general. I think the maximum in IE is somewhere around 2000 characters.

Edit; From the README:

Different browsers have different limits of the total URL length, however around 2000 characters seems to be the recommended safe maximum. At the moment there is currently nothing to enforce the limit, however a checksum is added to check that we get all the data.

I found a while ago most shorteners seem to limit at 2000 characters too, like the de facto browser standard mentioned on SO.

http://softwareas.com/the-url-shortener-as-a-cloud-database