Hi,
I just uploaded the newest Ltk version to my server: http://www.peter-herth.de/ltk/ (note that you have to download ltk-0.878.lisp, as I don't want to put it in the "official" tarball without further testing :)
Besides many small fixes, there are two mayor changes. First, with-ltk takes keyword parameters now , which configure the condition/error handling it does now (so you can if an error occors choose to restart mainloop for example) Secondly, the whole widget class generation code has been completely rewritten, using a macro to replace the rather long definitions, cutting 20k of the Ltk code ...
So, if anyone out there feels like giving it a test ride and give some feedback, I might release it officially soon.
Peter