Blocked from del.icio.us

I just noticed that I'm blocked from accessing del.icio.us from my forums. It's not a very high trafficed forum and I'm getting the message:
Sorry, you've been temporarily blocked for accessing del.icio.us too rapidly. This could be the result of using a buggy, misconfigured, or malicious program. It could also be accidental on our part. Please hold off for a few minutes and try again later, in a gentler fashion.

Any ideas?

Looks as if this is happening across all of my VBSEO sites.

Maybe too many of your users were submitting links?

It's three completely different sites. One has virtually no users.

In fact, the same thing is happening here at VBSEO.

I don't seem to be having this problem here, or at other forums. Could this be something specific to your personal account?

How many articles have you submitted over the past few days leading up to this block?

I've just added this thread to bookmarks at del.icio.us without issues.

Must be my IP address because this all started as a result of running LinkSleuth ...or maybe that is the root of the problem. Maybe LinkSleuth pinged the hell out of Delicious causing my IP to be temporarily banned.

LS must have been the issue. Everything is back to normal this morning. Thanks.