# 3.15.3 Release Notes Squirro 3.15.3 was released on March 19, 2026. Learn more about the [Squirro Release Process](../squirro-release-process.md#getting-squirro-process). ## What’s New - Rhein data loader plugin with ACL support. ## Improvement - LTS release channel available in the instance upgrade Studio plugin. ## Bug Fixes - Text tokens streamed before tool calls missing from agent responses. - Accumulated answer text discarded when the code interpreter used within an agent turn. - Pre-tool and post-tool text concatenated without a separator in agent responses. - Multiple code interpreter calls in a single agent turn producing duplicate Generated Artifacts sections. - Instance upgrade Studio plugin not fetching the latest available releases and not supporting Enterprise Linux 8 and 9. - PDF conversion failing when missing MIME type of an input PDF file. - Adding labels to a data source no longer applying materialized tags. ## 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). ## 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.