id,summary,reporter,owner,description,type,status,priority,milestone,component,resolution,keywords,cc,planetversion,pltversion
133,Use of {{{set-cdr!}}},untyped,jim,"Hi Jim,

Webit! uses {{{set-cdr!}}}, which is no longer possible in PLT 4 now cons cells are immutable by default. I believe you have the option of switching over to mutable cons cells or removing all mutation. More information here:

{{{
http://blog.plt-scheme.org/2007/11/getting-rid-of-set-car-and-set-cdr.html
}}}

Many thanks,

-- Dave Gurnell
www.untyped.com
",defect,new,major,,jim/webit.plt,,"cons, immutable, set-car!, set-cdr!",,,4.1.2.2