When is select the zoom in the status bar, cells selected to freeze are loose.
not reproducible with LO 3.6.6.2 (Ubuntu 12.04.2 LTS) see also Bug 57324 & Bug 61060
I can't reproduce that issue while playing with zoom level on LO 4.0.5.1 (Win7 32bit) Maybe I misunderstood, please REOPENED if you meant different.