manage group assignments fails (selection of users lost)

GROUP PART
If the group you want to assign them to is not in the list of the first ten (for instance, it's the eleventh in the list alphabetically ordered), then you cannot select that group for those users.
If you try to go to next page of groups (I guess), then the selection of users is lost.
Using 1.9.2.

This bit was fixed by sylvie last week. Xavi (31/01/06)

USERS PART
To reproduce:
Reorder the list of users by any field so that you get some users in the list that where not seen at the default view of users (that's a key point to reproduce the bug).

Select some of those users, to assign them to a group. After I click on submit button (with "manage group assignments" selected), then the page is loaded with the default ordering, so that those users are not listed in the page. If I select then the group to have them assigned to, and submit, the users are not assigned to that group.

However, if I restart the process, but request to show 1000 users (what ever number, but ensure you list ALL of them). Reorder again users (last connected, for instance). Then select some of them. Click to "manage group assignments), and then, the page will loose the ordering, but at least you'll be able to see your users among the long list, and tehy keep the box toggled on (so that selection is not lost!). In this case, assigning to a group worked!

The bug must be somehow related to the registers that are ot selected to be shown, even if they are still selected to be assigned to the group.
Hope this helps to fix the bug. Xavi 31/01/06

This second part was fixed by sylvie after the report, later on the same 31/01/06...,