Document Library tab: Cannot upload or drag&drop files (Bug)

pblbsyl 
I finally have a useful update from Microsoft.

This should likely close the issue off:

Microsoft acknowledge the bug and that their product team are rolling out a solution which should be out in the next few weeks:

Unfortunately this does not actually fix the damage done......
This bug corrupts customer data yet Microsoft have not acknowledged it in the message center or service updates.
Further: They have confirmed to me it is not possible to identify or restore the corrupt files- they will be lost.

I see this as "solved" in some way although i have lost a little more faith in Microsoft today- to me this is a business practice which does not encourage our trust. these kinds of bugs should be communicated.

Alex