Hi all,
I also face the same problem on a Dell laptop (E4310 model, Latitude series): 
mouse disappears on windows containing clickable areas and some text.
I attach information about my VGA controller:

$ lspci -vv

00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated 
Graphics C
ontroller (rev 02) (prog-if 00 [VGA controller])
        Subsystem: Dell Device 0410
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SER
R- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- 
>SERR- <PERR- INTx-
        Latency: 0
        Interrupt: pin A routed to IRQ 42
        Region 0: Memory at f0000000 (64-bit, non-prefetchable) [size=4M]
        Region 2: Memory at e0000000 (64-bit, prefetchable) [size=256M]
        Region 4: I/O ports at 60b0 [size=8]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: <access denied>
        Kernel modules: i915

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https://bugs.launchpad.net/bugs/774434

Title:
  mouse pointer disappears in ubuntu (11.04 onwards...)

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