The SHELX license agreement has had an 'indemnity clause' in it for the last 30 years and no-one has complained about it yet! See: http://shelx.uni-ac.gwdg.de/SHELX/applfrm.htm
George Prof. George M. Sheldrick FRS Dept. Structural Chemistry, University of Goettingen, Tammannstr. 4, D37077 Goettingen, Germany Tel. +49-551-39-3021 or -3068 Fax. +49-551-39-2582
