You are invited to check out our minor 7.7.1 release, which contains the following patches and fixes:
XQUERY
- we have switched to the new map syntax (example: {‘key’:‘value’})
- tail call optimization is now also applied to dynamic functions
- fn:subsequence() calls and sequence casts are better optimized
- original options are preserved when calling db:optimize()
WEBDAV
- non-breakable spaces are returned as  
CORE
- OutOfMemory exceptions are avoided when building large databases
Your feedback is welcome, Christian, BaseX Team, 2013