If you are talking about an issue that disappears after short time then this is not a bug... it's just load! If your hildon-home freezes for several minutes (not desktop! you will still be able to switch desktops or open taskswitcher or menu...) and does not come back responsive without crashing (all icons disappear) or being restarted, here is your bug

https://bugs.maemo.org/show_bug.cgi?id=8723

PLEASE do not comment like "me too" or something! Vote for it if you like. bugs.maemo.org is a technical bug tracker not forums.

[edit] just to mention it, python stuff (like recaller) makes hildon-home slow or even freeze sometime as the python widgets eat up memory (and this cannot be fixed) even if asked to free memory they seem to leak.