Sam,
I'm assuming the old forum settings resized any Avatar pictures to the maximum display size allowed and that a lot of people had larger file sizes in the pictures they had previously linked. Because the forum settings restricted the display size, I am sure they only appeared as small sizes in the user name display area because the software restricted the actual display size. It now looks like the forum software does not automatically resize the users linked image therefore it is cropping those with larger images to the maximum display window on the left sidebar.
I assume the restriction of size will be reinstated soon, and in the meantime you can resize your Avatar image to 150 pixels or less for it to display correctly. Perhaps try that and re-link it in your Avatar settings and it will display correctly. I made mine small and it's working good. The signature image redirect is another bug that will need to be sorted out and I'm sure it's on the list of things being looked at. My signature image appears as a link as well and the editing box in settings does not have an option for adding an image for signatures. I have tried pasting every redirect link possible from photobucket and all appear as a link only. An option needs to be added to the edit fields to add an image to the signature setup.
Great job on the conversion so far Jody. One thing I'd request, duplicate that forum jump box at the bottom right of the screen and add one to the top navigation bar so users do not need to scroll to the bottom to reset the page or jump to another section of the forums. The old site had hot links along the top of the page so if you were reading a thread in one particular section, you could go top of the page and jump to another section without having to back out of the pages?
I think the old hot link button was called
"FORUMS" and clicking it took you to the home page displaying all sections. It was
linked to this index page but didn't open it as a new page, it just returned you to index as home and had that link left on the top navigation bar?