I was just about to ask the same question about the a/e affix, no idea what that is. Can we verify what the latest firmware version is (and where it can be downloaded)?
Assuming the page linked to on the wiki is for all firmware updates I would expect that the latest is the one on there. I haven't checked it, but I suspect that it is 1.01a.
Could it be a regional thing? Maybe the ixus and elph have slightly different firmwares. Which is yours?
I doubt it, but I'm also new to this business. If you mean me with "yours": I have 1.01a.
I updated the firmware to the 1.01a and it worked fine. after that the update firm menu still showed up when I put the chdk files on it did not show up
Strange stuff. Can you make sure you have the CHDK PS.FI2 in the root (this is not where the pictures are stored) of your SD card? Also make sure that the firmware update is completely removed from the card. I just checked it myself - to be sure I formatted my card and downloaded the zip from this thread - and it works fine. I don't think there should be any problems with this part of the port.