Why does Opera 7.0 not work with IntraWeb 5.1, but IntraWeb 5.1 supports Opera?
When IntraWeb 5.1 was released, Opera 6.0 was the current release. With the exception of some specific features that are documented not to be supported with Opera, IntraWeb 5.1 does work with Opera 6.0. Since this time Opera has released Opera 7.0 and made some large changes to their Javascript support which are not compatible with those of Opera 6.0. Note: There are recent reports that Opera 7.1 now functions again. If this is the case, it is likely that Opera has fixed the incompatibilities they introduced in 7.0.
