I've installed DC v2.5 with common connect theme enabled recently. Things are going fine except for the imagecache presets which are well defined but amazingly overridden to a fixed squared box.It may be a small,medium or large BUT always end up to be a square(30x30,136x136).
I switched to the common original theme and realised that things were going as expected there.

What can be the reason behind this strange behaviour ?

Many thanks