I tried to delete a column via the "Modify Table" popup. Selecting the column and clicking on "Remove" brought up a popup that said "No error", but the column remained. The SQL log for the app shows:

SAVEPOINT sqlitebrowser_rename_column
CREATE TABLE sqlitebrowser_rena... <string can not be logged, contains binary data> ... INSERT INTO sqlitebrowser_rename_column_new_table SELECT_ID,name,local_path_template,is_localized,is_automatic,file_set_idFROMFileInfo; DROP TABLEFileInfo`;
ROLLBACK TO SAVEPOINT sqlitebrowser_rename_column;

which I interpret to mean that a) the rollback means that the operation failed, despite the "No error" popup, and b) perhaps binary data in the CREATE TABLE statement is not helping, either? (Could this be a side-effect of the new UTF-8 support?)