Hello support,
i managed to produce twice an error in the import/export-example on your server. What I did: I copied the first time a big content from a word doc into RTE and tried to download a word-document. It crashed. (it says locally <, hex 0x3c is an illegal attribute-sign)
Then I uploaded the word-document and tried to download it as new word-document: crash again. Just happend a few minutes ago.