I've had to fix a bunch of custom BBCodes that weren't working right since we upgraded to 3.2, like table and pet-look ones. They changed the BBcode engine entirely for 3.2 and it broke any codes that used variable arguments . The new system seems needlessly complicated for the average board user, and is poorly documented, and I had to scour through loads of support threads to find enough examples to work out what to do.
This probably won't affect many users (maybe only me?) but one thing that I had to change was the format for the td (table cell) element because I couldn't implement it the same way in the new system. If you want to add styles to the tag, you previously did:
Where colspan = the number of columns the cell spans, and style is the html styling.
Now you do:
You can omit either the style or colspan part entirely. Before you had to always include the number of columns if you were also going to add style.