On JIRA OnDemand, when uploading a custom image for use as the logo on the JIRA installation, the image will appear blurry after uploading. Look and Feel section of the Admin panel:
https://instance.atlassian.net/secure/admin/LookAndFeel!default.jspa

By default the JIRA logo image is 114x60 and the custom image uploaded is auto-resized to 57x30, exactly half the size. Attached is a screenshot of the difference between the default JIRA logo (left) and a uploaded custom image of an jira logo uploaded as a custom image and auto reduced size (right) for comparison

As a resolution It would be nice to have JIRA OnDemand use higher resolution custom and default images. Or at least match the Default image resolution.