# 3.15.2 Release Notes Squirro 3.15.2 was released on March 4, 2026. Learn more about the [Squirro Release Process](../squirro-release-process.md#getting-squirro-process). > **Notes for administrators** > > This release introduces important changes that may require adjustments to your existing setup. [Learn more](#breaking) ## Improvements - Extended file upload support for additional Office and text-based document formats. - Enhanced user permission validation to apply a role-based fallback when project permissions exceed the scope of the user role. - Added an all-permissions matching method to improve the accuracy of permission validation. - Added the ability to rename items collections. - Improved validation for asset and widget endpoints and added boolean type conversion for query parameters. - Updated the MySQL connection charset from `utf8` to `utf8mb4` to match the table encoding and ensure full Unicode support. ## Bug Fixes - Single-page PDFs not handled correctly when using the retriever with image reasoning in Squirro Chat. - `/var/log/squirro/topic/stderr.log` growing continuously due to `DeprecationWarning` messages in wsgiservice-based services. - Item details loading indefinitely when the chat widget was opened directly from a URL. - Chat not functioning correctly with RSS data sources. - Context variable propagation in asynchronous executor calls affecting tracing. - Semantic search plugin not correctly handling the TERMS array filter syntax. - Index Manager `/cluster/health` endpoint not responding correctly. - Double quotes not escaped when applying a facet filter from the Labels widget. - Incorrect interpolation of encrypted configuration values. - Collection update operations not returning the correct 409 status code when a collection with the same name already exists. - World Map widget crashing when the map component was not yet initialized. - Data loading failures when using the Squirro connector with instances running a version prior to 3.15.1. - Chat with Document feature missing the item ID when dashboard selections were active. - Parent item not always cleaned up from the index and neither retried nor moved to a failed batch when sub-items failed to index. ## Known Issues - In specific scenarios, cross-lingual information retrieval for semantic search may deliver lower-than-expected quality (SQ-28171). - An error may occur when chatting with an uploaded .pptx file in Squirro Chat (SQ-31480). ## Breaking Changes - Removed string support for `project_permissions` in [`SquirroClient.new_grant`](../../../api/squirro_client.user.UserApiMixin.md#squirro_client.user.UserApiMixin.new_grant). The method now raises a `ValueError` if a non-list value is provided. ## Installation and Upgrade For new installations, find step-by-step instructions on the [Install and Manage Squirro with Ansible](../../install/ansible/index.md#ansible) page (recommended) and [Installing Squirro on Linux](../../install/linux.md#install-linux) pages. To upgrade an existing installation, see the [Upgrading Squirro](../../install/upgrade.md#install-upgrade) page.