Originally Posted by HarryT
Not on the PRS-505 they don't - it displays all ePubs left justified.
To be 100% correct, it's an Adobe Digital Editions rendering engine issue with the versions that Sony used for its older (pre-350/650/950) readers. Sony could upgrade the older models but they'd rather you upgrade to a newer model. Alternatively you could install alternate software but that may bring other issues like needing to liberate DRMed books that otherwise would've worked on the stock firmware.