The Kristall module, a multi-purpose laboratory, was added to Mir in June this year. It had extra solar arrays to contribute to Mirís power demands. It also had a docking port, which was designed to accommodate the Soviet Buran space shuttle, but was never used for this purpose after the Buran project was abandoned.
The Soyuz TM-10 capsule suffered problems when it docked with Mir in August. Its thermal insulation blankets, designed to protect it from the extremes of space, worked loose and cosmonauts had to perform a hazardous spacewalk to repair it.