Hello all,
first the info: basex 7.0.2 debian 64bit jre 1.6.0_30-b12
We are experiencing some strange behaviour with basex - certain update queries are causing our database to become corrupted, and we need to drop the database and re-import in order to be able to continue. Here is an example of such a query:
replace node collection("ft")/user/user[@id='2']/logsheets/logsheet[@date='2011-12-20']/exercise[2] with <exercise/>
The query executes successfully, however, executing db:list('ft') after this call gives us only garbled text. The basexgui shows the results of this as: 
>•_'蘼 
 ..................etc.... Perhaps it's the query, or our original data which we are starting with?
Any help would be greatly appreciated.
best regards, Adrian