Case summary report filters incorrectly for case type
Case summary report uses REGEXP filtering for case type:
WHERE case_civireport.case_type_id REGEXP '[[:cntrl:]]*5[[:cntrl:]]*'
Which results in records where case type id consists of 5 (for this example).
The clause looks old and appears to be based on assumption that case could be based on multiple case types. Case type however is an integer column and could use where() clause of CRM/Report/Form.php.
The problem also been raised on stack exchange - https://civicrm.stackexchange.com/questions/30573/case-type-filter-bug-in-case-summary-report-multiple-case-types-reported.
A PR would follow.