Description of problem:
In translation editor of a document that has multiple page, 
1.4.2-SNAPSHOT has a weird behaviour when:

1. Type "hi" in the last entry of page 1 and press alt-down
2. Type "yo" in the first entry of page 2 and prest alt-up
3. "hi" does not appear in the the last entry of page 1
4. however, click on last entry of page 1 bring back "hi"

Version-Release number of selected component (if applicable):
Zanata version 1.4.2-SNAPSHOT (20111019-1122)
1.4.1 does not have this problem, however.

How reproducible:
Always

Steps to Reproduce:
0. Visit a document that have multiple pages, such as
UserGuide->Playing_multimedia
1. Type "hi" in the last entry of page 1 and press alt-down
2. Type "yo" in the first entry of page 2 and prest alt-up

Actual results:
"hi" does not appear in the the last entry of page 1
however, click on last entry of page 1 bring back "hi"

Expected results:
"hi" appears in the the last entry of page 1