Internet Explorer Caching File Uploads? -

i have basic page includes <input type="file"> element. when submit form file selected, server responds spreadsheet gets opened in excel (a "new window"). implication of behavior initial screen , input element still visible in ie. if change data on disk of selected file , resubmit form, internet explorer uploads old contents second time; latest changes not present in content sent server. if select file via input's browse... button again, new file contents uploaded expected. firefox sends file's contents disk expected/desired behavior. seems internet explorer doing kind of caching of uploaded file contents.

is there way disable "feature" , have ie pull data disk each time form submitted?

is there documentation available on behavior? it's first time i've encountered , searches have largely come empty.

you can test out conjecture live demos posted on ms-connect.

[...] bug began ie10, when filelist , blob implemented.
input.files html5 filelist of file/blob items.
populate it, ie blobs each filepicker choice. have "snapshot state" (w3c term).
they're kept sync'd in case selected file updated before submission.
bug is, ie fails detect if file deleted, renamed, or replaced.
filepicker snapshot goes stale in circumstance.

here happens when file selected in filepicker, renamed , edited, prior submitting filepicker selection. although new file (with original filename) has been substituted in place, original file (now different name , modified text) gets sent in form. how possible? though tracked via ntfs objectid, used distributed link tracking. note in screenshot, file name not agree file content.

so, it's not "caching" thing @ all. it's tracking bug.