Version 1.5.3 (2012-04-05)

    HTML5: Check if xhr object is initialized, before calling abort() on it.
    HTML4: Postpone form removal until uploaders state changes, to avoid error on resuming stopped uploads.
    BrowserPlus: Fix mechanical typo, that caused error during mime type check.
    BrowserPlus: browserPlus.Uploader.Cancel() has two required parameters, dies with the error if not passed.
    Flash: Improve runtime's behaviour during upload cancellation.
    Flash: Survive the case when GPSVersionID contains unexpected value.
    Flash: Fix random freeze in Chrome's bundled Flash Player.
    Flash: Avoid the silent break when URLStream not yet open, but close is called on it.
    Flash: Move Destroy handler out of Flash:Init handler, since it might be called not only after Flash:Init but also before it.
    Flash: Avoid warning during build with mxmlc.
    Try removeEventListener first in IE and only if it fails - detachEvent.
    Fix plupload.getPos to return proper value in IE8+.
    Do not initiate plupload.STARTED state, if file queue is empty.
    Additional language packs: Estonian, Polish, Korean, French-Canadian, Greek, Persian/Farsi.