Polaris Office on the Asus Transformer TF-101 saves files only as "bad" .doc files compatible with newer versions of MS Office only.
Fortunately the files can be opened with Abiword, so you can use it to convert the files for reading with LibreOffice (OpenOffice).
[email protected] ~ $ file Desktop/Sheila.doc Desktop/Sheila.doc: CDF V2 Document, corrupt: Cannot read summary info [email protected] ~ $ abiword --to=odt Desktop/Sheila.doc [email protected] ~ $ file Desktop/Sheila.odt Desktop/Sheila.odt: OpenDocument Text