Hang using numerical sort

Using the latest OMAP4 rom (25/11/13).
If the new ‘numerical sort’ is ticked and a network folder is accessed that contains files that only differ by file type I get a hang.
This happens with both Omni and SunFish.

An example that triggers the hang is a remote folder containing,

textfile1,ff8
textfile1,e1f

If there is no number in the filename part of the name the folder opens normally.