Comment 6 for bug 151162

User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:1.8.1.4) Gecko/20070515 Firefox/2.0.0.4
Build Identifier: Version 1.5.0.12 (20070509)

If you drag the attachment to the
desktop you have to keep the left mouse button pressed for some seconds so the
attachment is "loaded" (you see a progress bar). Then you can release the
button and the attachment is successfull copied. Otherwise (without waiting) an
error message shows up ("file in use"). You can work with this inconvenience but
it is unexpected, not state of the art and contradicts usability a lot (because
most people won't discover the workaround).

Reproducible: Always

Steps to Reproduce:
1. Quickly drag and drop big attachment (>3 MB) to desktop

Actual Results:
1. Error-Message "File in use", click on "OK" then
2. Download dialog with progress bar appears like the attachment is actually downloaded
3. No attachment is copied

Expected Results:
Copying attachment to desktop without any delay