It sounds ridiculous, but tablet-dedicated forum is unreadable on my tablet (N800, OS2008). The biggest problem I have is those small buttons (arrows after dates, "Quote", "Edit" etc ) are enlarged and cover almost full screen . I have screenshots but don't know yet how to insert them here.
I did some changes to the about:config to set minimum fonts but I am pretty sure I had same experience before.
Another minor problems I would point to are very slow rendering and very massive graphic header, which cover almost all first page. In other words, page is too heavy for a tablets. Don't we have mobile light version?

I've actually found the "classic" page style to be better than the mobile ones. As for the over-enlarged graphic elements, I've seen this happen if I have a combination of a zoom setting and fit-page-to-width set. It appears there is a bug in the zoom function that over-enlarges the graphic click buttons.

Yep, it was Fit to page width option bug. I unchecked it and now it looks much better now. Thanks!