Packages in teTeX or TeXlive with problematic licenses

This is a list of problematic files or CTAN packages in tetex-base and tetex-src, initially taken from tetex-base's copyright file (copyright.header in the source package). Some things are not up-to-date - the extsizes stuff is already resolved, e.g.

Serious problems

Less serious problems

This is more restrictive than LPPL 1.3 (6.a and 6.d.2). The title is advice...