A new indexing system is being used.
When lotusscript uses ftsearch and the database doesn't have ftsearch temporay indexes are created in GTRHOME.
This can create GTRHOME directorys of gigabytes in size very quickly. To solve the problem either:
put FT_LIBNAME=ftgtr in the server's notes.ini file to use the old search system again.
Alternatively make sure all databases that use ftsearch have a full text index.