As always, Eric has compiled KDE 4.8.1 for Slackware-Current users and put them on his KTown repository that is mirrored into several servers, including my UKDW Repo Server.
Full credit should go to Eric, not me. Bug report should go upstream, but you can also post it on Eric's blog to let him know about it. Suggestions and comments about the packages should also be posted on Eric's blog for further enhancement or updates.
Download and enjoy the beautifully free KDE.
For your information, the total size of KDE 4.8.1 is getting bigger compared to previous edition (4.7.x). The x86 is now 785 MB and x86_64 is 1,1 GB. In total, the KDE 4.8.1 packages + sources consumes around 3,4 GB (for both architecture)