I reïnstalled Links SQL into a new directory. Everything seems to be OK, except for one thing: my 1721 links now appear in every 89 categories...
When I check the tables in de database I cannot find any problem, so I think it must be somewhere in Links.

Please take a look in the testarea where I have running a dynamic version: http://www.plinx.nl/pl/ .

What to do?

Problem solved after a re-install.