ISL Light 3.3.2 for Windows (2010-12-09)


General Information

On 13th December 2010 we have released:

  • ISL Light Client 3.3.2 (2010-12-09) for Windows
  • ISL Light Desk 3.3.2 (2010-12-09) for Windows
  • Desktop Control 1.3.2 (2010-12-10) for Windows


Please check also release information for releases of 3.3.0 and 3.3.1 for full feature set of new version:

ISL Light 3.3.0 for Windows (2010-11-04)

ISL Light 3.3.1 for Windows (2010-11-24)

Upgrading to new version

Hosted Service

Please visit and start ISL Light Desk or ISL Light Client from new version tab.

Direct links:

Server License

Upgrades are free of charge for ISL Online Server License users with active Extended Support Service. ISL Online Server License users with expired Extended Support Service are welcome to purchase Extended Support Service in order to gain access to the newly released ISL Online Server system. In case you have extended ESS you will need to create new license file and upload it to your ISL Conference Proxy server.

Quick Instructions for users with ISL Conference Proxy 3.1 installed

  1. open web administration of ISL Conference Proxy http://localhost:7615/conf
  2. login using admin account
  3. click Online update link in left navigation
  4. click Apply changes if you have automatic install

Improvements since ISL Light 3.3.1 application

New features

[ISLLIGHT-41] - ISL Light - disable hardware acceleration while streaming desktop on WinXP, 2000 and 2003 Server (R*) More


ISL Light works really poorly when HW acceleration is on, so it will try to disable HW acceleration and re enable it once ISL Light finishes.

[ISLLIGHT-42] - ISL Light - minimize mouse cursor blinking on streaming side More


We have implemented combined BitBlt with no flickering if there is no layered windows.

[ISLLIGHT-45] - ISL Light - add command line for selecting "best quality" More


Added color=64k option in command lines. It selects "Best quality".

[ISLLIGHT-46] - ISL Light - limit usage of CPU for screen sharing side More


CPU usage is limited for grab/encode thread to:

* single core: max 45%of total time

* multiple cores: max 50% of kernel time

Defect fixes

[ISLLIGHT-27] - ISL Light - can not aquire control if remote side is moving mouse More


A problem when local user could not aquire back control was fixed.

[ISLLIGHT-29] - ISL Light - black screen on dual monitor blacks only primary display More


When connecting to dual screen display, only one monitor was overlapped with black screen.

[ISLLIGHT-30] - ISL Light - select remote monitor 1 on dual monitor shows only white screen More


On some computers with dual monitor desktop, selection of one monitor showed only white screen. The problem was fixed

[ISLLIGHT-33] - ISL Light - mouse cursor does not show in ISL View window More


In some situations when wathcing VMWare remote console or similar programs, mouse cursor was not transfered correctly. When there is no mouse cursos a block of 3x3 pixels is shown.

[ISLLIGHT-34] - ISL Light - force transport HTTPS-DIRECT makes tunnel first using port 7615 should use port 443 More


When user forced connection through HTTPS-DIRECT ISL Light used wrong port 7615 instead of 443.

[ISLLIGHT-35] - ISL Light - BitBlt can be slow on computers with hardware accelerated graphics More


If BitBlt is slow on computer ISL Light will switch to old implementation with WM hooks.

[ISLLIGHT-38] - ISL Light command lines without spaces between arguments do not work anymore More


Command lines with deprecated syntax - no spaces between arguments - did not work. We reverted to old implementation.

[ISLLIGHT-48] - ISL Light - handle leak on reconnects More


Fixed a handle leak in reconnect procedure.

[ISLLIGHT-49] - ISL Light - Slow mouse movement More


The mouse movement gets queued if moving it without stopping. We skip mouse movements in case there are many in queue.

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