I'll send you a debug version next week.

Windows Vista 64-bit English, bug exists
Windows Vista 32-bit English, bug exists
Windows XP Professional 32-bit English, bug doesn't appear

I checked old versions and 3.8.2 is the last version that doesn't have this problem. Starting with 4.0.0 all versions have the problem.

Here is an image of the problem after pressing Alt key

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tpeland wrote:

Change language (for example from Finnish to English)

This has been fixed already.

start winscp
Press (left) alt-key
=> the buttons "About", "Login", "Save..." and "Close" disappear from window

I'm not able to reproduce that. Maybe it is Vista of 64-bit related issue. Can you see the problem on another setups (if you have any)?

Ftp + ipv6 + passive not working.

This issue has been added to tracker.

OS: Windows Vista Enterprise 64-bit

--- Bug 1 ---
Change language (for example from Finnish to English)

=> Error: Invalid access to memory <OK>
The program continues to work otherwise correctly in the new language.

--- Bug 2 ---
start winscp
Press (left) alt-key
=> the buttons "About", "Login", "Save..." and "Close" disappear from window

--- Bug 3 ---
Ftp + ipv6 + passive not working.

It seems that winscp tries to use wrong port number. Winscp uses the command channels local port number instead of data channels server port number.

Example:
Command channel: client:49000 <-> server:22
Server reported dataport (EPSV): 51000
Winscp tries to connect to server:49000 for data retrieval
=> timeout