Well, Slack does the symlink I told you by default, so that won't fix it. I'll try to compile grip and tell you how I did it IF i success
EDIT: I downloaded grip and could configure & compile it without problems, detected curl all went ok. I'm using Slackware-current.
I've just found this in Slackware's logs, so try upgrading curl from one of the slackware mirrors.
Mon Jun 7 00:56:25 PDT 2004
n/curl-7.12.0-i486-1.tgz: Upgraded to curl-7.12.0. This uses a new
major shared library version number (.so.3), so all libcurl linked
programs will need to be recompiled.