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-rw-r--r--docs/howto/outputting-pdf.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/docs/howto/outputting-pdf.txt b/docs/howto/outputting-pdf.txt
index 55f80bb4cc..e7e4bdcfa5 100644
--- a/docs/howto/outputting-pdf.txt
+++ b/docs/howto/outputting-pdf.txt
@@ -100,6 +100,12 @@ mention:
* Finally, it's important to call ``showPage()`` and ``save()`` on the PDF
file.
+.. note::
+
+ ReportLab is not thread-safe. Some of our users have reported odd issues
+ with building PDF-generating Django views that are accessed by many people
+ at the same time.
+
Complex PDFs
============